(19)

(11)

EP 0 151 133 A1

(12)

(43) Date of publication: 14.08.1985 Bulletin 1985/33 (21) Application number: 84902388.0 (22) Date of filing: 23.05.1984

(51) International Patent Classification (IPC):  G09G 5/ 20( . ) G09G 5/ 00( . ) G06F 3/ 153( . ) G09G 5/ 393( . ) (86) International application number: PCT/US1984/000788 (87) International publication number: WO 1985/000679 (14.02.1985 Gazette 1985/04)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 20.07.1983 US 19830515946 (71) Applicant: RAMTEK CORPORATION Santa Clara CA 95050 (US)	(72) Inventor: SMITH, David, M. Saratoga, CA 95070 (US) (74) Representative: Reinländer & Bernhardt Patentanwälte  Orthstrasse 12 D-8000 München 60 D-8000 München 60 (DE)