(19)

(11)

EP 0 815 550 A1

(12)

(43) Date of publication: 07.01.1998 Bulletin 1998/02 (21) Application number: 96907868.0 (22) Date of filing: 05.02.1996

(51) International Patent Classification (IPC):  G06F 3/ 033( . ) G06F 11/ 267( . ) G06F 3/ 041( . ) (86) International application number: PCT/US1996/001597 (87) International publication number: WO 1996/024923 (15.08.1996 Gazette 1996/37)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 07.02.1995 AU 1995PN00927 (71) Applicant: ELO TOUCHSYSTEMS, INC. Fremont, CA 94538 (US)	(72) Inventor: LIA, Keith Heidelberg Heights, VIC 3081 (AU) (74) Representative: Hoffmeister, Helmut, Dr. Dipl.-Phys.  Patentanwalt Goldstrasse 36 48147 Münster 48147 Münster (DE)