(19)

(11)

EP 0 665 970 A1

(12)

(43) Date of publication: 09.08.1995 Bulletin 1995/32 (21) Application number: 93922606.0 (22) Date of filing: 15.10.1993

(51) International Patent Classification (IPC):  G07D 3/ 14( . ) (86) International application number: PCT/GB1993/002138 (87) International publication number: WO 1994/009451 (28.04.1994 Gazette 1994/10)

(84) Designated Contracting States: DE FR GB SE (30) Priority: 19.10.1992 GB 19920021868 (71) Applicant: DE LA RUE SYSTEMS LIMITED London WC2N 4DE (GB)	(72) Inventors: MITCHELL, Stephen, Peter Portsmouth, Hants P06 2NP (GB) ABDILLA, Richard Ilford, Essex 1G3 8NA (GB) (74) Representative: Skone James, Robert Edmund, et al  GILL JENNINGS & EVERY Broadgate House 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)