(19)

(11)

EP 0 876 668 A1

(12)

(43) Date of publication: 11.11.1998 Bulletin 1998/46 (21) Application number: 96937082.0 (22) Date of filing: 01.11.1996

(51) International Patent Classification (IPC):  B03C 1/ 035( . ) H01F 7/ 02( . ) (86) International application number: PCT/US1996/017398 (87) International publication number: WO 1997/016835 (09.05.1997 Gazette 1997/20)

(84) Designated Contracting States: DE FR GB IT NL (30) Priority: 03.11.1995 US 19950006202P (71) Applicant: DAVID SARNOFF RESEARCH CENTER, INC. Princeton, NJ 08543-5300 (US)	(72) Inventor: MC BRIDE, Sterling Lawrenceville, NJ 08648 (US) (74) Representative: Pratt, Richard Wilson, et al  D. Young & Co, 21 New Fetter Lane London EC4A 1DA London EC4A 1DA (GB)