(19)

(11)

EP 0 396 593 A1

(12)

(43) Date of publication: 14.11.1990 Bulletin 1990/46 (21) Application number: 89900859.0 (22) Date of filing: 12.12.1988

(51) International Patent Classification (IPC):  G06K 9/ 62( . ) G06K 9/ 68( . ) G06K 9/ 22( . ) (86) International application number: PCT/GB1988/001100 (87) International publication number: WO 1989/005494 (15.06.1989 Gazette 1989/13)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 11.12.1987 US 19870131734 (71) Applicant: LOH, Shiu-Chang Toronto, Ontario M5S 2C3 (CA)	(72) Inventor: LOH, Shiu-Chang Toronto, Ontario M5S 2C3 (CA) (74) Representative: Orr, William McLean, et al  URQUHART-DYKES & LORD 5th Floor, Tower House Merrion Way Leeds West Yorkshire, LS2 8PA Leeds West Yorkshire, LS2 8PA (GB)