(19)

(11)

EP 0 535 145 A1

(12)

(43) Date of publication: 07.04.1993 Bulletin 1993/14 (21) Application number: 91912679.0 (22) Date of filing: 14.06.1991

(51) International Patent Classification (IPC):  G06K 15/ 12( . ) (86) International application number: PCT/US1991/004279 (87) International publication number: WO 1991/020056 (26.12.1991 Gazette 1991/29)

(84) Designated Contracting States: AT BE DE DK FR GB IT LU NL SE (30) Priority: 21.06.1990 US 19900541820 25.07.1990 US 19900558036 15.08.1990 US 19900567839 (71) Applicant: THE IDENTIFICATION BUSINESS, INC. Chesterfield, MO 63005 (US)	(72) Inventors: JEANBLANC, Ivan, M. Chesterfield, MO 63005 (US) HUTCHISON, Stephen, E. Manchester, MO 63021 (US) VIRKUS, Mark, K. Manchester, MO 63021 (US) JOHNSEN, Ronald, J. Manchester, MO 63021 (US) (74) Representative: Sanders, Peter Colin Christopher, et al  BROOKES & MARTIN High Holborn House 52/54 High Holborn London WC1V 6SE London WC1V 6SE (GB)