(19)

(11)

EP 0 441 864 A1

(12)

(43) Date of publication: 21.08.1991 Bulletin 1991/34 (21) Application number: 89912744.0 (22) Date of filing: 03.11.1989

(51) International Patent Classification (IPC):  G06F 17/ 30( . ) G09B 7/ 04( . ) G09B 5/ 06( . ) G09B 19/ 06( . ) (86) International application number: PCT/US1989/004953 (87) International publication number: WO 1990/005350 (17.05.1990 Gazette 1990/11)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 04.11.1988 US 19880267079 (71) Applicant: DYNED INTERNATIONAL, INC. San Francisco, CA 94132 (US)	(72) Inventors: KNOWLES, Lance San Francisco, CA 94132 (US) CRANE, Douglas Portola Valley, CA 94025 (US) (74) Representative: Williams, Trevor John  J.A. KEMP & CO. 14 South Square Gray's Inn London WC1R 5LX London WC1R 5LX (GB)