(19)

(11)

EP 0 055 264 A1

(12)

(43) Date of publication: 07.07.1982 Bulletin 1982/27 (21) Application number: 81901697.0 (22) Date of filing: 26.06.1981

(51) International Patent Classification (IPC):  G06F 11/ 18( . ) G06F 17/ 40( . ) (86) International application number: PCT/GB1981/000114 (87) International publication number: WO 1982/000065 (07.01.1982 Gazette 1982/01)

(84) Designated Contracting States: CH DE FR GB LI NL (30) Priority: 26.06.1980 GB 19800021021 (71) Applicant: GP-ELLIOTT ELECTRONIC SYSTEMS LIMITED Wimbledon London SW19 (GB)	(72) Inventor: ELLIOTT, Gordon Paul Purley, Surrey (GB)