(19)

(11)

EP 0 396 654 A1

(12)

(43) Date of publication: 14.11.1990 Bulletin 1990/46 (21) Application number: 89909658.0 (22) Date of filing: 04.08.1989

(51) International Patent Classification (IPC):  F42C 21/ 00( . ) G01R 31/ 00( . ) G01R 31/ 28( . ) G01R 31/ 02( . ) (86) International application number: PCT/US1989/003368 (87) International publication number: WO 1990/001670 (22.02.1990 Gazette 1990/05)

(84) Designated Contracting States: CH DE FR GB IT LI NL SE (30) Priority: 05.08.1988 US 19880228431 (71) Applicant: RITMANICH, Will Los Gatos, CA 95030 (US)	(72) Inventor: RITMANICH, Will Los Gatos, CA 95030 (US) (74) Representative: Brunner, Michael John, et al  GILL JENNINGS & EVERY Broadgate House 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)