(19)

(11)

EP 0 067 170 A1

(12)

(43) Date of publication: 22.12.1982 Bulletin 1982/51 (21) Application number: 81903176.0 (22) Date of filing: 09.11.1981

(51) International Patent Classification (IPC):  G11C 11/ 14( . ) G11C 19/ 08( . ) (86) International application number: PCT/US1981/001496 (87) International publication number: WO 1982/001959 (10.06.1982 Gazette 1982/15)

(84) Designated Contracting States: DE FR GB NL SE (30) Priority: 24.11.1980 US 19800209901 24.11.1980 US 19800209900 (71) Applicant: Western Electric Company, Incorporated New York, N.Y. 10038 (US)	(72) Inventors: BOBECK, Andrew Henry Chatham, NJ 07928 (US) SHAPIRO, Herbert Meyer Bridgewater, NJ 08807 (US) (74) Representative: Weitzel, David Stanley, et al  Western Electric Company Limited 5, Mornington Road Woodford Green Essex IG8 0TU Woodford Green Essex IG8 0TU (GB)