(19)

(11)

EP 0 398 982 A1

(12)

(43) Date of publication: 28.11.1990 Bulletin 1990/48 (21) Application number: 89902599.0 (22) Date of filing: 09.02.1989

(51) International Patent Classification (IPC):  G06K 5/ 00( . ) G07D 7/ 04( . ) G07D 7/ 20( . ) G06K 9/ 00( . ) G07D 7/ 12( . ) (86) International application number: PCT/US1989/000515 (87) International publication number: WO 1989/007804 (24.08.1989 Gazette 1989/20)

(84) Designated Contracting States: DE FR GB NL SE (30) Priority: 09.02.1988 GB 19880002940 (71) Applicants: DERSTINE, Christine Kitchener, Ontario N2G 1L4 (CA) NALLY, Robert B. Ontario N2J 1S1 (CA)	(72) Inventor: NALLY, Robert, B. Waterloo, Ontario N2J 1S1 (CA) (74) Representative: Warren, Keith Stanley, et al  BARON & WARREN 18 South End Kensington London W8 5BU London W8 5BU (GB)