EXHIBIT 11 INTERDIGITAL COMMUNICATIONS CORPORATION AND SUBSIDIARIES COMPUTATION OF NET INCOME (LOSS) PER SHARE (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS) (UNAUDITED) SIX THREE MONTHS MONTHS ENDED ENDED COMPUTATION OF PRIMARY JUNE 30, JUNE 30, EARNINGS (LOSS) PER SHARE: 1996 1996 Net Income (Loss) Applicable to Common Shareholders $ 677 $ 4,575 ========== ========= Weighted Average of Primary Shares: Common Stock 46,138 45,522 Assumed Conversion of Options and Warrants 2,434 2,409 ---------- --------- 48,572 47,931 ========== ========= Net Income (Loss) Per Share $ .01 $ .10 ========== ========= A calculation for the three and six month periods ended June 30, 1997 have not been presented since the effect of the options and warrants would be anti-dilutive.