UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549
                         ------------------------------

                                    FORM 11-K
                         ------------------------------

|X|  ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF
     1934

     For the fiscal year ending December 31, 2004

                                       OR

|_|  TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT
     OF 1934

             For the transition period from __________ to _________

                        Commission File Number 333-66626

A. Full title of the plan and the address of the plan, if different from that of
the issuer named below:

                     INTERDIGITAL COMMUNICATIONS CORPORATION
                          SAVINGS AND PROTECTION PLAN

B. Name of issuer of the securities held pursuant to the plan and the address of
its principal executive office:

                     INTERDIGITAL COMMUNICATIONS CORPORATION
           781 Third Avenue, King of Prussia, Pennsylvania 19406-1409








                                      - 1 -






                     INTERDIGITAL COMMUNICATIONS CORPORATION
                           SAVINGS AND PROTECTION PLAN



                                TABLE OF CONTENTS
                                -----------------




                                                                                            Page Number
                                                                                            -----------
                                                                                             
Reports of Independent Registered Public Accounting Firms                                       3-4
Basic Financial Information:
     Statements of Net Assets Available for Benefits as of December 31, 2004 and
     2003                                                                                         5
     Statements of Changes in Net Assets Available for Benefits for the
     Years Ended December 31, 2004 and 2003                                                       6
     Notes to Financial Statements                                                           7 - 16
Additional Information:
     Schedule of Assets (Held at End of Year)                                                    17
     Schedule of Reportable Transactions                                                         18
     Other supplemental  schedules required by Section  2520.103-10 of the Department
     of Labor Rules and  Regulations  for Reporting and  Disclosure  under ERISA have
     been omitted because they are not applicable.
Signature                                                                                        20
Exhibit 23.1 Consent of Cogen Sklar LLP                                                          21
Exhibit 23.2 Consent of Grant Thornton LLP




                                     - 2 -




             REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
             -------------------------------------------------------


Participants and Plan Administrator
InterDigital Communications Corporation
  Savings and Protection Plan
King of Prussia, Pennsylvania


We have audited the accompanying  statement of net assets available for benefits
of  InterDigital  Communications  Corporation  Savings and Protection Plan as of
December 31, 2004, and the related  statement of changes in net assets available
for  benefits  for the year  then  ended.  These  financial  statements  are the
responsibility  of the Plan's  management.  Our  responsibility is to express an
opinion on these financial statements based on our audit.

We  conducted  our audit in  accordance  with  standards  of the Public  Company
Accounting Oversight Board (United States). Those standards require that we plan
and perform the audit to obtain reasonable assurance about whether the financial
statements are free of material misstatement.  An audit includes examining, on a
test basis,  evidence  supporting  the amounts and  disclosures in the financial
statements.  An audit also includes assessing the accounting principles used and
significant  estimates  made by  management,  as well as evaluating  the overall
financial  statement  presentation.   We  believe  that  our  audit  provides  a
reasonable basis for our opinion.

In our opinion,  the financial  statements  referred to above present fairly, in
all material  respects,  the net assets  available for benefits of  InterDigital
Communications  Corporation Savings and Protection Plan as of December 31, 2004,
and changes in its net assets available for benefits for the year then ended, in
conformity with accounting principles generally accepted in the United States.

Our audit was  performed  for the  purpose  of  forming  an opinion on the basic
financial statements taken as a whole. The supplemental  schedule of assets held
for  investment  purposes and  reportable  transactions  are  presented  for the
purpose of additional analysis and is not a required part of the basic financial
statements  but is  supplementary  information  required  by the  Department  of
Labor's Rules and  Regulations  for Reporting and Disclosure  under the Employee
Retirement  Income Security Act of 1974.  These  supplemental  schedules are the
responsibility of the Plan's  management.  The supplemental  schedules have been
subjected to the auditing procedures applied in the audit of the basic financial
statements  and, in our opinion,  are fairly stated in all material  respects in
relation to the basic financial statements taken as a whole.



/s/ Cogen Sklar LLP
-------------------
Bala Cynwyd, Pennsylvania
May 27, 2005


                                     - 3 -





             Report of Independent Registered Public Accounting Firm
             -------------------------------------------------------


Participants and Plan Administrator
InterDigital Communications Corporation Savings and Protection Plan


     We have audited the  accompanying  statements  of net assets  available for
benefits of the InterDigital  Communications  Corporation Savings and Protection
Plan as of December 31, 2003 and the related  statement of changes in net assets
available  for benefits for the year ended  December 31, 2003.  These  financial
statements are the responsibility of the Plan's management.

     We conducted our audit in accordance  with  standards of the Public Company
Accounting Oversight Board (United States). Those standards require that we plan
and  perform  the  audits to  obtain  reasonable  assurance  about  whether  the
financial  statements  are free of  material  misstatement.  An  audit  includes
examining,  on a test basis,  evidence supporting the amounts and disclosures in
the  financial  statements.  An audit also  includes  assessing  the  accounting
principles  used  and  significant  estimates  made  by  management,  as well as
evaluating the overall  financial  statement  presentation.  We believe that our
audits provide a reasonable basis for our opinion.

     In our opinion,  the financial statements referred to above present fairly,
in all material  respects,  the net assets available for benefits of the Plan as
of December 31, 2003,  and the changes in net assets  available for benefits for
the year then ended, in conformity with accounting principles generally accepted
in the United States of America.


/s/ Grant Thornton LLP
----------------------
Philadelphia, Pennsylvania
July 8, 2004


                                     - 4 -





                     INTERDIGITAL COMMUNICATIONS CORPORATION
                           SAVINGS AND PROTECTION PLAN
                 STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS
                           DECEMBER 31, 2004 AND 2003




                                                       2004                 2003
                                                  ----------------     ----------------
                                                                     
CASH AND INVESTMENTS AT FAIR VALUE

Cash                                                     $ 11,559    *     $13,948,408
                                                  ----------------     ----------------

Investments in common trusts
Stable Pooled Collective Trust                            898,545                    -
                                                  ----------------     ----------------

Registered investment companies
Money Market Fund                                         814,236                    -
Short Horizon Fund                                        275,713                    -
Equity Growth Fund                                        392,713                    -
Mid-Cap Growth Fund                                       383,983                    -
International Fund                              *       1,463,438                    -
Long Horizon Fund                                         379,630                    -
Value and Income Fund                                     360,801                    -
Special Equity Fund                             *       1,549,106                    -
Mid-Cap Value Fund                              *       2,923,478                    -
Intermediate Bond Fund                                    681,088                    -
Core Bond Fund                                          1,001,068                    -
Intermediate Horizon Fund                                  49,099                    -
                                                  ----------------     ----------------
                                                       10,274,353                    -
                                                  ----------------     ----------------
Interest in other funds
AIM Real Estate Funds, Class A                          1,032,451                    -
Baron Small Cap Fund                                      845,380                    -
Transamerica PRM Core Equity Investment         *       1,901,890                    -
Transamerica PRM Equity Index                   *       3,295,232                    -
                                                  ----------------     ----------------
                                                        7,074,953                    -
                                                  ----------------     ----------------

InterDigital Stock Fund                         *       2,447,075    *       1,787,194
                                                  ----------------     ----------------

Participant Loans                                         156,234               76,670
                                                  ----------------     ----------------

Employer Profit Sharing Receivable                        567,808                    -
                                                  ----------------     ----------------

NET ASSETS AVAILABLE FOR BENEFITS                     $21,430,527          $15,812,272
                                                  ================     ================



*   Represents 5% or more of net assets available for benefits.


    The accompanying notes are an integral part ofthese financial statements.


                                     - 5 -




                     INTERDIGITAL COMMUNICATIONS CORPORATION
                           SAVINGS AND PROTECTION PLAN
           STATEMENTS OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS
                 FOR THE YEARS ENDED DECEMBER 31, 2004 AND 2003




                                                                2004                   2003
                                                           ----------------      -----------------
                                                                                   
ADDITIONS
Investment income
Interest and dividend income, investments                          $ 8,157               $ 10,102
Net appreciation in fair value of investments                    2,348,174              2,973,075
                                                           ----------------      -----------------
Total investment income                                          2,356,331              2,983,177
                                                           ----------------      -----------------

Contributions
Employer                                                         1,434,203                805,882
Participants                                                     2,616,283              2,304,553
                                                           ----------------      -----------------
Total contributions                                              4,050,486              3,110,435
                                                           ----------------      -----------------

Asset transfers in                                                  97,430                 36,876
                                                           ----------------      -----------------

TOTAL ADDITIONS                                                  6,504,247              6,130,488
                                                           ----------------      -----------------

DEDUCTIONS
Payment of benefits                                                885,316              1,801,851
Other deductions                                                       676                 45,138
                                                           ----------------      -----------------

TOTAL DEDUCTIONS                                                   885,992              1,846,989
                                                           ----------------      -----------------

NET INCREASE                                                     5,618,255              4,283,499

NET ASSETS AVAILABLE FOR BENEFITS -
BEGINNING OF YEAR                                               15,812,272             11,528,773
                                                           ----------------      -----------------

NET ASSETS AVAILABLE FOR BENEFITS - END OF YEAR                $21,430,527            $15,812,272
                                                           ================      =================



   The accompanying notes are an integral part of these financial statements.


                                     - 6 -




                     INTERDIGITAL COMMUNICATIONS CORPORATION
                           SAVINGS AND PROTECTION PLAN
                          NOTES TO FINANCIAL STATEMENTS


NOTE 1 - DESCRIPTION OF THE PLAN

The following description of the InterDigital Communications Corporation
Savings  and  Protection  Plan (the Plan) is provided  for  general  information
purposes.  Participants  should refer to the Plan  agreement for a more complete
description of the Plan's provisions.

General
-------
The Plan is a defined contribution 401(k) plan of InterDigital
Communications  Corporation and its  participating  subsidiaries (the "Company")
for eligible  employees  over the age of 18 and who have  completed one month of
service.  Beginning in 2004,  individuals  employed by the Company as part of an
academic course of study, such as a work-study program, co-op program or similar
arrangements,  are not eligible.  The Plan was established effective February 1,
1985 and restated  January 1, 1997. The Plan is subject to the provisions of the
Employee  Retirement  Income Security Act of 1974, as amended (ERISA).  Reliance
Trust Company is the trustee of the Plan.

Contributions
-------------
All participant contributions are made on a before-tax basis. In 2003 each
participant  could  invest  from  1% to 15% of  annual  compensation  as a basic
contribution,  beginning  2004 each  participant  may invest  from 1% to 100% of
annual  compensation  as a  basic  contribution.  The  total  of the  basic  and
supplemental contributions cannot exceed IRS limitations for each plan year. For
the 2004 and 2003 plan  years,  the  total  IRS  limitations  were  $13,000  and
$12,000, respectively. If a participant's annual contributions exceed the dollar
limitation  set by the IRS,  thereby  requiring  a  distribution  of such excess
contributions,  the participant will forfeit any employer matching contributions
related to the  distribution  amount.  Amounts  forfeited will be used to reduce
future employer contributions.

The Company may, at its sole discretion, contribute to the Plan through
matching contributions and/or discretionary contributions.  Beginning July 2001,
the Company matches 50% of each participant's  contribution,  up to a maximum of
6% of the  participant's  pretax  annual basic  compensation,  as defined by the
plan.  During 2003, 50% of the Company match consisted of cash and the other 50%
was directed by the Company to the InterDigital  Stock Fund.  Beginning in 2004,
the Company match is directed by the Company to the InterDigital  Stock Fund and
may  be  immediately  transferred  to  other  investment  alternatives  by  Plan
participants. Discretionary contributions are lump sum payments made to the Plan
as  determined  from time to time by the Board of Directors  of the Company.  In
first quarter 2005, the Company contributed 32,632 shares of InterDigital Common
Stock,  valued at $567,808,  to  participant  accounts in  association  with the
Company's  performance  in 2004.  The Plan  recorded  a  related  receivable  at
December 31, 2004. The Company did not make any  discretionary  contributions in
2003.

The  Internal  Revenue  Code  limits  the amount of pay that may be used to
determine  contributions.  The limit was $205,000 and $200,000 in 2004 and 2003,
respectively.  The law also limits the amount of all  contributions  that can be
made for or by a  participant  to the  Plan in a given  year.  The  limit is the
lesser  of 100% of pay or  $41,000  for 2004 and,  the  lessor of 100% of pay or
$40,000  for  2003.   Employee  rollover   contributions  from  other  qualified
retirement plans are permitted; such contributions are subject to the conditions
and procedures set forth in the Plan.

Participant Accounts
--------------------
Each participant's account is credited with that participant's contributions and
allocations of the Company's  matching and discretionary  contributions and Plan
earnings and losses.  Allocations of discretionary  contributions are based on a
participant's  annual  compensation  relative to the total  compensation  of all
other  participants.  The  benefit to which a  participant  is  entitled  is the
benefit that can be provided from the participant's vested account.  Terminating
participants forfeit unvested Company contributions. Forfeitures are used to pay
Plan expenses or reduce employer contributions.


                                     - 7 -




                     INTERDIGITAL COMMUNICATIONS CORPORATION
                           SAVINGS AND PROTECTION PLAN
                          NOTES TO FINANCIAL STATEMENTS


NOTE 1 - DESCRIPTION OF THE PLAN (Continued)

Vesting
-------
Participants  are immediately  vested in their salary deferral and rollover
contributions.  Vesting in Company  contributions is based on length of service.
Participants  vest  33  1/3%  on each of  their  first  three  anniversaries  of
employment.

Participants Loans
------------------
Any  participant  who is an active  employee  may apply for a secured  loan
provided the request  does not exceed the lesser of 50% of their vested  account
balance or $50,000.  The minimum loan amount was $500 and $1,000 during 2004 and
2003, respectively. Only one loan per participant may be made every 365 days and
all loans are  subject to  approval  by the Plan  Administrator.  Loan terms are
limited  to five  years set at the  inception  of each loan.  During  2003,  the
interest  rates were  determined by the loan  administrator  in accordance  with
prevailing market rates on similar types of loans.  Beginning in 2004,  interest
rates were set at an annual rate of prime + 1%. The rates of  outstanding  loans
at December 31, 2004 and 2003 range between 4.0% and 6.0%.  Interest paid by the
participant is credited to the participant's account. If a participant's balance
remains  unpaid  for  more  than 90 days  after it is due,  the loan  will be in
default on the outstanding loan amount and the participant's vested account will
be reduced by the amount of the unpaid principal and interest. The unpaid amount
is treated as a taxable  withdrawal and is subject to federal  income taxes.  At
December 31, 2004, one loan was in default in the amount of $20,193 in principal
and  interest.  Beginning in 2004,  outstanding  loans become due and payable in
full 60 days  after  the  related  participant  ceases to be an  employee  and a
party-in-interest,  as defined under ERISA or after complete  termination of the
Plan.

When a  participant  receives  a  distribution  from the Plan,  any  outstanding
principal  plus  accrued  interest  will be  deducted  from  the  amount  of the
distribution.  A  participant  may  then  either  default  on the  loan  or make
arrangements to continue loan  repayments  beyond when they become entitled to a
distribution  as long as their  remaining  interest  in the Plan  exceeds  their
outstanding loan balance.

Payment of Benefits
-------------------
If a participant  retires,  dies,  becomes  permanently  disabled,  or otherwise
separates  from the Company,  the  participant or  participant's  beneficiary is
entitled  to the  vested  amount of their  account  as valued on the  applicable
valuation  date. In the event of a  participant's  death,  distribution of their
account will be made as soon as administratively practicable upon the receipt of
appropriate  documentation from their designated beneficiary.  Distributions for
reasons of retirement,  permanent  disability or  termination  will be made upon
written request.  Distributions from participant accounts are typically made,
subject to certain limitations, using a single installment or deferred payment.

Plan Termination
----------------
The Company may amend or suspend the Plan and may terminate the Plan at any time
subject to the  provisions of ERISA;  although  there is no present intent to do
so. However,  no such action may cause the Plan's assets to be used for purposes
other than the exclusive benefit of the participants and their beneficiaries. If
the Plan is  terminated,  all such  participant  accounts  shall  become fully
vested  and  shall  be  distributed  as soon as administratively possible.


                                     - 8 -




                     INTERDIGITAL COMMUNICATIONS CORPORATION
                           SAVINGS AND PROTECTION PLAN
                          NOTES TO FINANCIAL STATEMENTS


NOTE 1 - DESCRIPTION OF THE PLAN (Continued)

Investment Options
------------------
All investments are participant directed except for 50% of the Company's
matching contribution, which by the terms of the Plan is directed by the Company
to the InterDigital Stock Fund. Participants may reallocate their holdings among
available investment options at any time. However,  prior to 2004,  participants
could not reallocate that portion of their Plan account that was attributable to
the Company's matching  contribution made after June 2001. During the plan years
ended December 31, 2004 participants  were able to allocate their  contributions
among the following investment options:


SHORT-TERM BONDS:
----------------

Money Market Fund
-----------------
This fund seeks high  current  income  while  preserving  capital and  providing
liquidity by investing in high quality  short-term cash  equivalent  securities,
such as commercial paper, bank acceptances,  and repurchase agreements. The Fund
will typically invest in A1/P1- rated debt  instruments,  and in securities with
maturities of 30-120 days. All  securities  will have  maturities  less than one
year.

Stabled Pooled Fund
-------------------
This Fund  seeks to provide  positive  income  with  reduced  return  volatility
through  investment  in a  diversified  portfolio of high  quality  fixed income
securities. The Fund invests in stable value fixed income instruments, including
Guaranteed  Investment Contracts (GIC's),  Bank Investment Contracts (BIC's), as
well as GIC alternatives, such as synthetic GIC's.


INTERMEDIATE/LONG-TERM BONDS:
----------------------------

Core Bond Fund
--------------
This  Fund  seeks  to  maximize  return  through  investment  in US  Government,
asset-backed and  mortgage-backed  securities,  corporate  securities,  and to a
lesser  extent,   convertible,   high  yield  and  international   fixed  income
securities.

Intermediate Bond Fund
----------------------
This Fund seeks maximum  current  income over the  intermediate-term  consistent
with  preservation  of  capital  primarily,  almost  exclusively,   through  the
investment  in  US  Government   securities,   its  Agencies  and  money  market
instruments.  The Fund maintains a dollar weighted-average  maturity of three to
ten wars under normal conditions. A three-year duration is typical.


LARGE-CAP STOCKS:
----------------

Value & Income Fund
-------------------
This Fund seeks long-term capital appreciation primarily through investment in a
diversified portfolio of common stocks selling at reasonable valuations relative
to their future projected earnings.  The Fund utilizes a combination of deep and
relative value sub styles.

Equity Growth Fund
------------------
This  Fund  seeks to  provide  a high  level  of  capital  appreciation  through
investment  in a  diversified  portfolio of common stocks with the potential for
above-average   growth  in  earnings.   The  Fund  utilizes  two  managers  with
complementary large capitalization growth styles.


                                     - 9 -




                     INTERDIGITAL COMMUNICATIONS CORPORATION
                           SAVINGS AND PROTECTION PLAN
                          NOTES TO FINANCIAL STATEMENTS


NOTE 1 - DESCRIPTION OF THE PLAN (Continued)

Transamerica PRM Core Equity Investment
---------------------------------------
Transamerica  Premier  Core Equity  Fund seeks  capital  appreciation.  The Fund
primarily  invests  in common  and  preferred  stocks,  warrants,  convertibles,
corporate and high-yield debt, and other securities that management  believes to
be undervalued. It may invest any proportion of assets in each type of security.
The Fund may invest in securities of any asset size, earnings level, or industry
type.  It may invest no more than 35% of assets in debt  rated  below-investment
grade.

Transamerica Premier Equity Index
---------------------------------
Transamerica  Premier Index Fund - Class M seeks to track the performance of the
S&P 500 index.  The fund invests in a combination  of common stocks  included in
the index, S&P 500 stock index futures and options, and short-term  investments.
It may not purchase  Transamerica  Corporation common stock.  Management seeks a
correlation  between the performance of the Fund and the index of .95 or higher.
To select securities, management solely takes into consideration the proportions
of securities within the index.


SMALL MID-CAP STOCKS:
--------------------

Mid-Cap Value Fund
------------------
The  Fund  seeks  capital  appreciation  through  investment  in  a  diversified
portfolio of medium size value-oriented  companies.  The Fund invests in quality
companies  undergoing  beneficial  strategic  changes  that are selling at below
market valuation standards due to limited analyst coverage and low expectations.

Mid-Cap Growth Fund
-------------------
The Fund seeks a high  level of capital  appreciation  through  investment  in a
diversified  portfolio  of  medium  size,  growth-oriented  companies.  The Fund
invests in high quality  companies whose growth in earnings will provide returns
in excess of the  market,  while  frequently  exhibiting  above-market  standard
valuation measures.

Special Equity Fund
-------------------
The Fund seeks to provide long-term capital appreciation through investment in a
diversified  portfolio  of  common  stocks  of small  size  companies.  The Fund
utilizes two growth-style managers, two value-oriented managers and a structured
core manager.  This provides an opportunity  for higher returns  relative to the
broad small-cap market over a full market cycle.

Baron Small Cap Fund
--------------------
Baron Small Cap Fund seeks capital  appreciation.  The Fund normally  invests at
least 80% of assets in securities of smaller companies. A small sized company is
defined as having a market value of under $2.5 billion.


INTERNATIONAL STOCKS:
--------------------

International Fund
------------------
The Fund seeks  long-term  capital  appreciation  by investing in both value and
growth oriented  companies.  The Fund invests  primarily in the stock markets of
the United Kingdom,  continental  Europe,  Japan,  Canada, and Australia.  Stock
selection is based on in-depth, local research.


                                     - 10 -




                     INTERDIGITAL COMMUNICATIONS CORPORATION
                           SAVINGS AND PROTECTION PLAN
                          NOTES TO FINANCIAL STATEMENTS


NOTE 1 - DESCRIPTION OF THE PLAN (Continued)

MULTI-ASSET/OTHER:
-----------------

AIM Real Estate A Funds, Class A
--------------------------------
AIM Real Estate Fund seeks high total return. The fund normally invests at least
80% of  its  assets  in  securities  of  real  estate  and  real  estate-related
companies.  The fund considers a company to be a real estate-related  company if
at least  50% of  assets,  gross  income  or net  profits  are  attributable  to
ownership,  construction,  management  or sale  of  residential,  commercial  or
industry  real  estate.  The fund may  invest up to 25% of its  total  assets in
foreign securities.

Intermediate Horizon Strategic Allocation Fund
----------------------------------------------
The  portfolio  seeks to  provide  greater  potential  for  long-term  return at
moderate risk levels by investing in an array of Diversified Investment Advisors
("Diversified")  Funds. The portfolio will invest in a combination of both fixed
income and equity funds, maintaining  approximately equal exposure to both asset
classes.  Fund  allocations  within asset classes are broadly designed to mirror
the market at large.

Long Horizon Strategic Allocation Fund
--------------------------------------
The  portfolio  seeks  to  attain  its  objective  by  investing  in an array of
Diversified's Funds with an emphasis on equity funds. The Fund will have limited
exposure to a variety of fixed  income  funds.  Fund  allocations  within  asset
classes are broadly designed to mirror the market at large.

Short Horizon Strategic Allocation Fund
---------------------------------------
The  portfolio  seeks  to  attain  its  objective  by  investing  in an array of
Diversified's  Funds. The primary emphasis is on fixed income funds with limited
exposure to equity  funds.  Fund  allocations  within asset  classes are broadly
designed to mirror the market at large.

InterDigital Stock Fund
-----------------------
This  fund   invests  in  the  Common  Stock  of   InterDigital   Communications
Corporation.

During the plan year ended December 31, 2003, participants were able to
allocate their contributions among the following investment options:

POOLED SEPARATE ACCOUNTS:

Guaranteed Interest Account
---------------------------
This account invests in private-market bonds,  commercial mortgages and mortgage
backed securities.  Contributions  placed in this account earn a guaranteed rate
of interest for either two or five year periods.

Money Market Account
--------------------
This account invests in high-quality  commercial  paper. The average maturity is
less than one month.

Bond & Mortgage Account
-----------------------
This  account  invests in  issuances of  five-to-ten  year bonds and  commercial
mortgages to companies located in various geographic regions.

Government Securities Account
-----------------------------
This account invests in various types of government  securities  including GNMA,
FNMA, FHLMC and SLMA.

Bond Emphasis Balanced Account
------------------------------
This account  invests in other accounts of The Principal Life Insurance  Company
("Principal").  The  account  usually  invests  from  50-100%  of its  assets in
conservative  and  moderate  investment  accounts,  as  defined,  and  0-50%  in
aggressive investment accounts, as defined.



                                     - 11 -




                     INTERDIGITAL COMMUNICATIONS CORPORATION
                           SAVINGS AND PROTECTION PLAN
                          NOTES TO FINANCIAL STATEMENTS


NOTE 1 - DESCRIPTION OF THE PLAN (Continued)

Large Cap Stock Index Account
-----------------------------
This account primarily invests in common stocks of those companies listed in the
S&P Stock Index.

Medium Company Value Account
----------------------------
This account invests in medium-sized  companies whose stock prices are perceived
to be low, relative to the companies' assets, profits, and other measures.

Large Company Blend Account
---------------------------
This account invests in stocks of larger  companies whose earnings and dividends
are expected to be above average.

Real Estate Account
-------------------
This account invests in developed rental properties including warehouses, office
building,  and retail  properties.  The properties are diversified by geographic
location and type.

Stock Emphasis Balanced Account
-------------------------------
This account invests in other accounts of Principal. The account usually invests
from 50-100% of its assets in dynamic and  aggressive  investment  accounts,  as
defined, and 0-50% in conservative investment accounts, as defined.

Medium Company Blend Account
----------------------------
This account  invests in  medium-sized  stocks that offer a combination of value
and earnings potential.

Small Company Blend Account
---------------------------
This  account  invests  in smaller  established  companies  with  above  average
long-term growth potential.

International Stock Account
---------------------------
This account  invests in common stocks of companies  located  outside the United
States. Industries are selected by evaluating the economic, social and political
factors of each market. Most investments are in Western Europe and Asia.

Principal Financial Group Income Stock Account
----------------------------------------------
This account invests in stock of The Principal  Financial Group,  Inc. The value
of its investment  changes based on changes in the market value of the stock and
expenses.


REGISTERED INVESTMENT COMPANIES:
--------------------------------

Vanguard Growth & Income Fund
-----------------------------
This Fund seeks a total annual return greater than that of the S&P 500 Index. At
least  65% (and  more  typically  90%) of the  Fund's  assets  are  invested  in
securities included in the S&P 500 Index.

Invesco Small Company Growth Fund
---------------------------------
This Fund seeks to invest in smaller,  established  companies with above average
long-term growth potential.

Janus Aspen Aggregate Growth Fund
---------------------------------
This Fund seeks long-term  capital growth.  The Fund typically  invests at least
50% of its assets in securities  issued by  medium-sized  companies whose market
capitalizations  fall within the range of the  companies  in the S&P Mid-Cap 500
Index.


                                     - 12 -




                     INTERDIGITAL COMMUNICATIONS CORPORATION
                           SAVINGS AND PROTECTION PLAN
                          NOTES TO FINANCIAL STATEMENTS


NOTE 1 - DESCRIPTION OF THE PLAN (Continued)

Strong Growth Fund
------------------
This Fund seeks capital appreciation.  The Fund normally invests at least 65% of
its assets in equity securities and may invest in companies of any size.

Strong Opportunity Fund
-----------------------
This Fund seeks capital appreciation.  The Fund normally invests at least 70% of
its  assets  in  equities,  including  common  stocks,  convertible  debentures,
preferred stocks,  convertible  preferred stocks, and warrants. It may invest up
to 30% of its assets in nonconvertible, corporate and government intermediate to
long-term debt  securities that  management  believes have  capital-appreciation
potential.

T. Rowe Price Science and Technology Fund
-----------------------------------------
This Fund seeks long-term growth of capital.  The Fund normally invests at least
65% of assets in companies,  both foreign and domestic,  that seek to develop or
use scientific and technological advances.

Putnam International Growth Fund
--------------------------------
This Fund seeks capital  appreciation.  The Fund invests mainly in common stocks
of companies  outside the United States.  The Fund normally invests at least 65%
of its assets in equity  securities of companies  located  outside of the United
States.


COMPANY STOCK:
-------------

InterDigital Stock Fund
-----------------------
This  Fund   invests  in  the  common  stock  of   InterDigital   Communications
Corporation.

Plan Amendments
---------------
In June 2001, the Compensation & Stock Option Committee of the Company's
Board of Directors authorized an amendment to the Plan to include increasing the
Company's  matching  contribution  from  25%  to  50%  of  the  first  6%  of  a
participant's  annual  compensation that a participant  contributes to the Plan,
(paying the additional 25% matching contribution in the Company's Common Stock),
adding the  Company's  Common Stock to the  selection of  investments  under the
Plan, permitting an additional discretionary year-end matching contribution and,
effective for employees hired on or after January 1, 2002, extending the vesting
period  of  the  Company's   matching   contributions  to  36  months  from  the
commencement of employment. The prior vesting policy permitted immediate vesting
of 33% upon  commencement of employment and vesting of 67% and 100% on the first
and second anniversaries of commencement of employment,  respectively. Under the
current vesting policy,  participants  vest 33 1/3% on each of their first three
anniversaries of employment.

In August 2001,  400,000 shares of the Company's  authorized but unissued Common
Stock were reserved for issuance to the account of  participants  in the Plan as
matching  contributions.  An agreement was entered into between the Company,  on
behalf of the Plan, and Web401(k).com and Fidelity Investments to serve as third
party administrator and custodian, respectively, of the InterDigital Stock Fund.
As more fully discussed in Note 3, Diversified  replaced  Principal,  Web 401(k)
and Fidelity Investments in these capacities in 2004.


NOTE 2 - SUMMARY OF ACCOUNTING POLICIES

The following accounting policies, which conform with accounting principles
generally accepted in the United States of America, have been used consistently
in the preparation of the Plan's financial statements.



                                     - 13 -




                     INTERDIGITAL COMMUNICATIONS CORPORATION
                           SAVINGS AND PROTECTION PLAN
                          NOTES TO FINANCIAL STATEMENTS


NOTE 2 - SUMMARY OF ACCOUNTING POLICIES (Continued)

Basis of Accounting
-------------------
Accounting  records  are  maintained  by the  custodian  on the  cash  basis  of
accounting.   The  financial   statements  of  the  Plan  reflect  all  material
adjustments  to  place  the  financial   statements  on  the  accrual  basis  of
accounting.

Use of Estimates
----------------
The preparation of financial statements in conformity with accounting principles
generally  accepted in the United States of America requires  management to make
estimates  and  assumptions  that  affect  the  reported  amounts  of assets and
liabilities and disclosures of contingent  assets and liabilities at the date of
the  financial  statements,  as  well  as  reported  amounts  of  additions  and
deductions during the reporting  period.  Actual results could differ from those
estimates.

Investment Valuation and Income Recognition
-------------------------------------------
Investments  in pooled  separate  accounts  are stated at fair value.  Shares of
registered  investment  companies  are  valued at  quoted  market  prices  which
represent  the net  asset  value of  shares  held by the Plan at  year-end.  The
InterDigital  Stock Fund and The Principal  Financial Group,  Inc. Stock Account
are valued at their  year-end  unit  closing  price  (comprised  of common stock
market price plus  uninvested cash  position).  Participant  loans are valued at
cost, which approximates fair value.

Purchases and sales of investments are recorded on a trade-date basis.  Interest
income is accrued when earned.  Dividend  income is recorded on the  ex-dividend
date. Capital gain distributions are included in dividend income.

The Plan invests in various  investment  securities.  Investment  securities are
exposed to various risks such as interest rate, market, and credit risks. Due to
the level of risk associated with certain investment securities,  it is at least
reasonably  possible that changes in the value of  investment  securities  will
occur  in  the  near  term  and  that  such  changes  could  materially   affect
participants'  account balances and the amounts reported in the statement of net
assets available for benefits.

Payment of Benefits
-------------------
Benefits are recorded when paid.

Forfeited Accounts
------------------
At December 31, 2004 and 2003, forfeited non-vested accounts totaled $8,000
and $7,820, respectively. These forfeited accounts were fully utilized to reduce
employer matching contributions in 2004 and 2003.


NOTE 3 - CUSTODIAN AND THIRD PARTY ADMINISTRATOR

Effective  January 1, 2004, the Plan appointed  Diversified to replace Principal
as the custodian and third party  administrator for the majority of Plan Assets.
Also  effective  January 1, 2004,  Diversified  replaced Web 401(k) and Fidelity
Investments as the third party  administrator  and custodian,  respectively,  of
InterDigital Common Stock held by the Plan.

On December 31, 2003,  Principal converted a portion of the Plan's holdings into
cash in preparation for the transfer of funds to  Diversified.  In January 2004,
Principal   transferred   approximately   $13.9  million  cash  to  Diversified.
Diversified invested these funds into investment options offered by Diversified,
in  accordance  with the  instructions  of each  participant.  In January  2004,
Principal and Fidelity (as  custodians)  also  transferred  InterDigital  Common
Stock with a total fair value of approximately $1.8 million,  as of December 31,
2003, to Diversified.



                                     - 14 -




                     INTERDIGITAL COMMUNICATIONS CORPORATION
                           SAVINGS AND PROTECTION PLAN
                          NOTES TO FINANCIAL STATEMENTS


NOTE 4 - INVESTMENT CONTRACT WITH INSURANCE COMPANIES

The Guaranteed Interest Account (the "Account"),  which was an investment option
in 2003,  provided  a  guaranteed  interest  rate  for a two year and five  year
period.  The rate credited to the Account was the rate in effect on the day each
deposit was directed to the Account. To simplify reporting to Plan participants,
all rates credited during 2003 were averaged into a single composite rate.

The  guarantees  made with regard to the Account  were  supported by the General
account of The Principal  Financial Group, Inc. The General Account was invested
mostly  in  private  placement  bonds,   commercial  mortgages  and  residential
mortgages.  The Account  promised  contract value for a benefit event,  however,
there was a market adjustment when funds were withdrawn prior to their maturity.
Thus, the Account was not considered benefit responsive.


NOTE 5 - INVESTMENTS

During  2004 and 2003,  the Plan's  investments,  including  gains and losses on
investments  bought  and sold,  as well as held  during  the  year,  appreciated
in value as follows:




                                                         2004             2003
                                                    ---------------  ---------------

                                                               
    Investment in Common Trusts                     $       26,124   $            -
    Registered Investment Companies                      1,352,383          440,719
    Interest in Other Funds                                699,109                -
    Pooled Separate Accounts                                     -        2,097,576
    InterDigital Stock Fund                                270,558          434,780
                                                    ---------------  ---------------

                                                    $    2,348,174   $    2,973,075
                                                    ===============  ===============




NOTE 6 - NONPARTICIPANT-DIRECTED INVESTMENTS

Information  about the  components  of and  significant  changes  in net  assets
relating to the Plan's nonparticipant-directed investments are as follows:




                                                         2004             2003
                                                    ---------------  ---------------
                                                               
    Net Assets
    InterDigital Stock Fund                         $    2,447,075   $    1,787,194
                                                    ===============  ===============

    Changes in Net Assets
    Contributions                                   $      923,904   $      560,846
    Net appreciation in fair value of investments          270,558          434,780
    Administrative expenses                                      -           (1,389)
    Distributions                                          (49,934)               -
    Transfers                                             (476,899)               -
    Forfeitures and other                                   (7,748)         (19,614)
                                                    ---------------  ---------------

                                                    $      659,881   $      974,623
                                                    ===============  ===============




                                     - 15 -





                     INTERDIGITAL COMMUNICATIONS CORPORATION
                           SAVINGS AND PROTECTION PLAN
                          NOTES TO FINANCIAL STATEMENTS




NOTE 7 - RELATED PARTY TRANSACTIONS

The Plan invests in shares of the Company's Common Stock through the
InterDigital  Stock  Fund.  In  2004,  the Plan  also  invested  in  funds  with
Diversified.  In 2003,  the Plan also  invested in Pooled  Separate  Account and
Guaranteed Interest Account investments with The Principal Financial Group, Inc.
Transactions in such investments qualify as party-in-interest  transactions that
are exempt from the prohibited transaction rules.


NOTE 8 - PLAN EXPENSES

All costs and expenses incurred in the administration of the Plan (i.e., trustee
and recordkeeper fees) are currently paid by the Company.


NOTE 9 - TAX STATUS

The Internal  Revenue  Service has determined and informed the Company by letter
dated July 8, 2002 that the Plan satisfies the qualification  requirements under
Internal  Revenue Code ("IRC")  Section 401(a) and that the trust  maintained in
connection with the Plan satisfies the  requirements for exemption under Section
501(a) of the IRC.  The Company  believes  the Plan is designed and is currently
being operated in compliance with the applicable requirements of the IRC.



                                     - 16 -




                     INTERDIGITAL COMMUNICATIONS CORPORATION
                           SAVINGS AND PROTECTION PLAN
                                 EIN 23-1882087
        SCHEDULE H, PART IV(i) - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
                                DECEMBER 31, 2004
                                 EIN 23-1882087





                                                                                           Fair
        Identity of Issue                           Investment Type                     Value
----------------------------------        ------------------------------------     ----------------
                                                                              

Cash                                      Cash                                      $      11,559
Stable Pooled Collective Trust*           Investments in common trusts                    898,545
Money Market Fund*                        Registered investment companies                 814,236
Short Horizon Fund*                       Registered investment companies                 275,713
Equity Growth Fund*                       Registered investment companies                 392,713
Mid-Cap Growth Fund*                      Registered investment companies                 383,983
International Fund*                       Registered investment companies               1,463,438
Long Horizon Fund*                        Registered investment companies                 379,630
Value and Income Fund*                    Registered investment companies                 360,801
Special Equity Fund*                      Registered investment companies               1,549,106
Mid-Cap Value Fund*                       Registered investment companies               2,923,478
Intermediate Bond Fund*                   Registered investment companies                 681,088
Core Bond Fund*                           Registered investment companies               1,001,068
Intermediate Horizon Fund*                Registered investment companies                  49,099
AIM Real Estate funds, Class A            Registered investment companies               1,032,451
Baron Small Cap Fund                      Registered investment companies                 845,380
Transamerica PRM Core
Equity Investment                         Registered investment companies               1,901,890
Transamerica PRM Equity Index             Registered investment companies               3,295,232
InterDigital Stock Fund*                  Company Stock Fund                            2,447,075 **
Participant Loans                         Participant Loan                                156,234
                                                                                   ----------------

TOTAL ASSETS HELD AT END OF  YEAR                                                     $20,862,719
                                                                                   ================



*transaction with party in interest
**cost basis is $1,674,173



                                     - 17 -






                                                                                                   
                     INTERDIGITAL COMMUNICATIONS CORPORATION
                           SAVINGS AND PROTECTION PLAN
                       SUPPLEMENTAL SCHEDULE H, PART IV(j)
                             REPORTABLE TRANSACTIONS
                                December 31, 2004


                                                                                                                      Gain (Loss) As
                                                                           Purchase       Selling    Historical Cost    a Result of
   Identity of Party Involved           Description of Asset                 Price         Price         of Asset       Transaction
---------------------------------   -----------------------------------  ------------   ------------ --------------- ---------------

Diversified Investors Advisors      Stable Pooled Collective Trust Fund  $ 1,033,923    $   161,502    $   158,854       $   2,648
 Collective Trust
Diversified Investors Funds Group   Transamerica PRM Equity Index Fund     2,869,388              -              -               -
Diversified Investors Funds Group   Transamerica PRM Equity Index Fund             -      3,194,654      3,019,154         175,500
Diversified Investors Funds Group   Money Market Account                   1,493,389        678,746        678,413             333
Diversified Investors Funds Group   International Fund                     1,374,261         93,596         91,648           1,948
Diversified Investors Funds Group   Special Equity Fund                    1,332,228              -              -               -
Diversified Investors Funds Group   Mid-Cap Value Fund                     2,043,968              -              -               -
Diversified Investors Funds Group   Mid-Cap Value Fund                       812,426        234,991        218,451          16,540
Diversified Investors Funds Group   Intermediate Bond Fund                   874,524        189,031        189,406            (375)
Diversified Investors Funds Group   Core Bond Fund                         1,170,600        168,016        167,476             540
Diversified Investors Funds Group   AIM Real Estate Funds, Class A           968,345        132,479        120,325          12,154
Diversified Investors Funds Group   Transamerica PRM Core Equity
                                     Investment Fund                       1,556,678              -              -               -
Diversified Investors Funds Group   InterDigital Stock Fund                1,787,047              -              -               -
Diversified Investors Funds Group   InterDigital Stock Fund                1,112,911        723,452        704,216          19,236
Diversified Investors Funds Group   Transamerica PRM Equity Index Fund     3,182,110              -              -               -


                                     - 18 -




SIGNATURE


Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
trustees (or other persons who administer  the employee  benefit plan) have duly
caused  this  Annual  Report  on Form  11-K to be  signed  on its  behalf by the
undersigned hereunto duly authorized.





                             INTERDIGITAL COMMUNICATIONS CORPORATION
                             SAVINGS AND PROTECTION PLAN


                             By: InterDigital Communications Corporation, in its
                                 capacity as Plan Sponsor and Plan Administrator



Date:    June 29, 2005       By: /s/ R.J. Fagan
                                 -------------------------------------
                                 Richard J. Fagan
                                 Chief Financial Officer


                                     - 19 -




                                  EXHIBIT INDEX

Exhibit Number                            Document
--------------                            --------

       23.1        Consent of Cogen Sklar LLP

       23.2        Consent of Grant Thornton LLP