(19)

(11)

EP 0 082 857 A1

(12)

(43) Date of publication: 06.07.1983 Bulletin 1983/27 (21) Application number: 82902022.0 (22) Date of filing: 17.05.1982

(51) International Patent Classification (IPC):  G11B 15/ 26( . ) G11B 15/ 67( . ) (86) International application number: PCT/US1982/000656 (87) International publication number: WO 1982/004035 (25.11.1982 Gazette 1982/28)

(84) Designated Contracting States: FR (30) Priority: 18.05.1981 US 19810264345 (71) Applicant: ROSSTREAM RESEARCH ASSOCIATES LTD. Cerritos, CA 90701 (US)	(72) Inventor: ROTTER, Gerhard Mission Viejo, CA 92691 (US)