X0202 4 2006-06-30 0000354913 INTERDIGITAL COMMUNICATIONS CORP IDCC 0001193089 ROATH ROBERT S 781 THIRD AVENUE KING OF PRUSSIA, PA 19406-1409 1 0 0 0 Common Stock 2006-06-30 4 S 0 44484 35.00 D 112116 D Common Stock 2006-06-30 4 S 0 7140 35.01 D 112116 D Common Stock 2006-06-30 4 S 0 13200 35.02 D 112116 D Common Stock 2006-06-30 4 S 0 300 35.04 D 112116 D Common Stock 2006-06-30 4 M 0 15000 5.6875 A 127116 D Option (Right-to-Buy) 5.4375 2006-06-30 4 M 0 30000 D 2007-09-21 Common Stock 30000 0 D Option (Right-to-Buy) 5.50 2006-06-30 4 M 0 6000 D 2007-09-03 Common Stock 6000 0 D Option (Right-to-Buy) 5.6875 2006-06-30 4 M 0 44124 D 2008-06-17 Common Stock 44124 3876 D A grant of 45,000 options which vested in equal installments of 7,500 on each of the following dates: 12/31/97; 06/30/98; 12/31/98; 06/30/99; 12/31/99; and 06/30/00. Granted pursuant to the InterDigital Communications Corporation 1997 Stock Option Plan for Non-Employee Directors. A grant of 6,000 options which vested in full on 06/18/98. A grant of 48,000 options which vested in equal installments of 16,000 on each of the following dates: 06/03/99; 06/01/00; and 06/04/01. Rebecca Bridgeford Opher, Attorney-In-Fact for Robert S. Roath 2006-07-05