(19)

(11)

EP 0 214 130 A1

(12)

(43) Date of publication: 18.03.1987 Bulletin 1987/12 (21) Application number: 85901220.0 (22) Date of filing: 14.02.1985

(51) International Patent Classification (IPC):  H04R 1/ 26( . ) H05K 5/ 02( . ) H04R 1/ 28( . ) (86) International application number: PCT/US1985/000228 (87) International publication number: WO 1986/005060 (28.08.1986 Gazette 1986/19)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (71) Applicant: YOO, Sin Yong Silver Spring, MD 20906 (US)	(72) Inventor: YOO, Sin Yong Silver Spring, MD 20906 (US) (74) Representative: Quest, Barry, et al  Wilson, Gunn, M'Caw & Co., 41-51 Royal Exchange, Cross Street Manchester M2 7BD Manchester M2 7BD (GB)