(19)

(11)

EP 0 202 250 A1

(12)

(43) Date of publication: 26.11.1986 Bulletin 1986/48 (21) Application number: 85905349.0 (22) Date of filing: 15.10.1985

(51) International Patent Classification (IPC):  G11B 5/ 71( . ) (86) International application number: PCT/US1985/001981 (87) International publication number: WO 1986/002478 (24.04.1986 Gazette 1986/09)

(84) Designated Contracting States: BE DE FR GB IT NL (30) Priority: 17.10.1984 US 19840661983 14.12.1984 US 19840681727 (71) Applicant: MEMOREX CORPORATION Santa Clara California 95052 (US)	(72) Inventors: CHUNG, Fred, Chi-Tat Palo Alto, CA 94303 (US) CLARK, Ross, Parker San Jose, CA 95175 (US) (74) Representative: Kirby, Harold Douglas Benson, et al  G.F. Redfern & Company Marlborough Lodge 14 Farncombe Road Worthing West Sussex BN11 2BT Worthing West Sussex BN11 2BT (GB)