(19)

(11)

EP 0 600 927 A1

(12)

(43) Date of publication: 15.06.1994 Bulletin 1994/24 (21) Application number: 92916385.0 (22) Date of filing: 31.07.1992

(51) International Patent Classification (IPC):  G04F 10/ 00( . ) G07C 1/ 22( . ) G04F 8/ 08( . ) G07C 1/ 24( . ) (86) International application number: PCT/CA1992/000329 (87) International publication number: WO 1993/004446 (04.03.1993 Gazette 1993/06)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 23.08.1991 CA 19912049783 (71) Applicant: LAIRD, Douglas A. Kelowna, British Columbia V1Y 4L8 (CA)	(72) Inventor: LAIRD, Douglas A. Kelowna, British Columbia V1Y 4L8 (CA) (74) Representative: Sommerville, John Henry, et al  SOMMERVILLE & RUSHTON 11 Holywell Hill St. Albans Hertfordshire, AL1 1EZ St. Albans Hertfordshire, AL1 1EZ (GB)