(19)

(11)

EP 0 105 340 A1

(12)

(43) Date of publication: 18.04.1984 Bulletin 1984/16 (21) Application number: 83901515.0 (22) Date of filing: 28.03.1983

(51) International Patent Classification (IPC):  G06K 15/ 00( . ) (86) International application number: PCT/US1983/000426 (87) International publication number: WO 1983/003487 (13.10.1983 Gazette 1983/24)

(84) Designated Contracting States: AT BE CH DE FR GB LI NL SE (30) Priority: 31.03.1982 US 19820363761 (71) Applicant: THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY Stanford, California 94305 (US)	(72) Inventor: PARDO, Luis Trabb Palo Alto, CA 94301 (US) (74) Representative: Crawford, Andrew Birkby, et al  A.A. THORNTON & CO. Northumberland House 303-306 High Holborn London WC1V 7LE London WC1V 7LE (GB)