(19)

(11)

EP 0 304 458 A1

(12)

(43) Date of publication: 01.03.1989 Bulletin 1989/09 (21) Application number: 88902158.0 (22) Date of filing: 02.03.1988

(51) International Patent Classification (IPC):  G07F 17/ 00( . ) G07F 7/ 00( . ) H04L 9/ 32( . ) H04N 7/ 167( . ) G07C 9/ 00( . ) H04H 1/ 00( . ) H04N 7/ 16( . ) (86) International application number: PCT/GB1988/000151 (87) International publication number: WO 1988/006826 (07.09.1988 Gazette 1988/20)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 02.03.1987 GB 19870004850 (71) Applicant: MARS INCORPORATED McLean Virginia 22101-3883 (US)	(72) Inventors: ARMOUR, James, Joseph Baydon Marlborough Wiltshire (GB) GLASSPOOL, Andrew, Jim, Kelley Addlestone Surrey KT15 2PQ (GB) (74) Representative: Burke, Steven David, et al  R.G.C. Jenkins & Co. 26 Caxton Street London SW1H 0RJ London SW1H 0RJ (GB)