X0202 4 2005-04-21 0 0001051902 IQ BIOMETRIX INC IQBX 0001044321 MARXE AUSTIN W & GREENHOUSE DAVID M 153 E 53RD ST 55TH FL NEW YORK NY 10022 0 0 1 0 Common Stock 2005-04-21 4 S 0 500 4.55 D 1491125 I By Limited Partnerships Common Stock 2005-04-22 4 S 0 997 4.55 D 1490128 I By Limited Partnerships Convertible Bonds 2 2005-04-21 4 C 0 1000 2 D 2005-01-11 2005-06-30 Common Stock 991125 1982250 I By Limited Parterships Convertible Bonds 2 2005-04-22 4 C 0 1994 2 D 2005-01-11 2005-06-30 Common Stock 990128 1980256 I By Limited Partnerships This is a joint filing by Austin W. Marxe (Marxe) and David M. Greenhouse (Greenhouse). They share voting and investment control over all securities own by Special Situations Private Equity Fund, L.P. (PE), Special Situations Technology Fund, L.P. (Tech) and the Special Situations Technology Fund II, L.P. (Tech II), respectively. 200,000 Warrants and 792,256 Corporate Bonds convertible into 396,128 shares of Common Stock owned by PE, 42,500 Warrants and 168,200 Corporate Bonds convertible into 84,100 shares of Common Stock owned by Tech and 257,500 Warrants and 1,019,800 Corporate Bonds convertible into 509,900 shares of Common Stock owned by Tech II. The Interest of Marxe and Greenhouse in the shares of Common Stock owned by PE, Tech and Tech II is limited to the extent of his pecuniary interest. Austin W. Marxe 2005-04-25 David M. Greenhouse 2005-04-25