(19)

(11)

EP 0 433 359 A1

(12)

(43) Date of publication: 26.06.1991 Bulletin 1991/26 (21) Application number: 89910158.0 (22) Date of filing: 06.09.1989

(51) International Patent Classification (IPC):  G06K 9/ 62( . ) G06K 9/ 46( . ) G06K 9/ 34( . ) G06K 9/ 68( . ) (86) International application number: PCT/GB1989/001043 (87) International publication number: WO 1990/003012 (22.03.1990 Gazette 1990/07)

(84) Designated Contracting States: BE CH DE FR GB IT LI NL SE (30) Priority: 07.09.1988 GB 19880021024 (71) Applicants: ETHERINGTON, Harry James Godalming, Surrey GU7 1PA (GB) JOSLIN, Paul Carter Bracknell, Berks RG12 2XG (GB) Newman, Roger Keith Bishops Waltham, Southampton, Hampshire SO3 1DU (GB)

(72) Inventors: ETHERINGTON, Harry, James Godalming Surrey GU7 1PA (GB) JOSLIN, Paul, Carter Bracknell Berks RG12 2XG (GB) NEWMAN, Roger, Keith Southampton Hampshire SO3 1DU (GB) BAXTER, Peter Winchester Hants SO22 4EW (GB) LIDSTONE, Steven East Leigh Hants SO5 5JP (GB) (74) Representative: Skone James, Robert Edmund  GILL JENNINGS & EVERY, Broadgate House, 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)