(19)

(11)

EP 0 188 609 A1

(12)

(43) Date of publication: 30.07.1986 Bulletin 1986/31 (21) Application number: 85903960.0 (22) Date of filing: 01.08.1985

(51) International Patent Classification (IPC):  H04R 3/ 00( . ) H04R 17/ 00( . ) (86) International application number: PCT/US1985/001469 (87) International publication number: WO 1986/001362 (27.02.1986 Gazette 1986/05)

(84) Designated Contracting States: AT BE CH DE FR GB LI NL SE (30) Priority: 03.08.1984 US 19840637649 (71) Applicant: MOTOROLA, INC. Schaumburg, IL 60196 (US)	(72) Inventor: HALCHUCK, Timothy, William Gardena, CA 90249 (US)