=============================================================================== UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 -------------- FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): March 24, 2005 -------------- InterDigital Communications Corporation Savings and Protection Plan (Exact name of registrant as specified in its charter) Pennsylvania 333-66626 23-1882087 (State or other jurisdiction of (Commission (IRS Employer incorporation) File Number) Identification No.) 781 Third Avenue, King of Prussia, Pennsylvania 19406-1409 (Address of Principal Executive Offices) (Zip Code) Registrant's telephone number, including area code: 610-878-7800 Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: |_| Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) |_| Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) |_| Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) |_| Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) =============================================================================== Item 4.01. Changes in Registrant's Certifying Accountant. (a) Previous independent registered public accounting firm On March 24, 2005, Grant Thornton LLP (Grant Thornton) notified the administrators of the InterDigital Communications Corporation Savings and Protection Plan (the 401(k) Plan) that it declined to stand for reappointment as the independent registered public accounting firm engaged to audit the financial statements of the 401(k) Plan, a tax-qualified employee benefit plan. Grant Thornton is not the auditor of record for InterDigital Communications Corporation. Grant Thornton audited the 401(k) Plan financial statements for the year ended December 31, 2003. The report of Grant Thornton contained no adverse opinion or disclaimer of opinion, and was not qualified or modified as to uncertainty, audit scope, or accounting principles. During fiscal year ended December 31, 2003 and the subsequent interim period through March 24, 2005, there were no disagreements with Grant Thornton on any matter of accounting principles or practices, financial statement disclosure, or audit scope or procedure, which disagreement(s), if not resolved to the satisfaction of Grant Thornton, would have caused it to make reference to the subject matter of the disagreement(s) in connection with its report. In addition, during the fiscal year ended December 31, 2003 through the date of Grant Thornton's final audit report dated July 8, 2004, there have been no "reportable events" as defined by Item 304(a)(1)(v) of Regulation S-K. Grant Thornton's decision not to stand for reappointment was approved by the InterDigital Communications Corporation Administrative Committee in its capacity as Plan Administrator of the 401(k) Plan. Grant Thornton has furnished the Administrative Committee with a copy of a letter addressed to the SEC stating that it agrees with the above statements. A copy of Grant Thornton's letter, dated February 10, 2006, is filed as Exhibit 16.1 to this Form 8-K. (b) New independent registered public accounting firm On May 19, 2005, Morison Cogen LLP (f.k.a. Cogen Sklar LLP) was engaged as the new independent registered public accounting firm to audit the financial statements of the 401(k) Plan for the year ended December 31, 2004 (Morison Cogen). Morison Cogen is not the auditor of record for InterDigital Communications Corporation. Item 9.01. Financial Statements and Exhibits. (c) Exhibits. The following exhibit is filed with this report: Exhibit 16.1 - Letter from Grant Thornton LLP dated February 10, 2006, to the Securities Exchange Commission Regarding Change in Certifying Accountant. 2 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report 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 By: /s/ R.J. Fagan -------------------------------------------- Richard J. Fagan Chief Financial Officer Date: February 10, 2006 3 EXHIBIT INDEX Exhibit No. Description ---------- ----------- 16.1 Letter from Grant Thornton LLP dated February 10, 2006, to the Securities Exchange Commission Regarding Change in Certifying Accountant. 4