(19)

(11)

EP 0 356 433 A1

(12)

(43) Date of publication: 07.03.1990 Bulletin 1990/10 (21) Application number: 88902745.0 (22) Date of filing: 09.03.1988

(51) International Patent Classification (IPC):  H04R 9/ 02( . ) H04R 9/ 06( . ) H04R 9/ 04( . ) (86) International application number: PCT/US1988/000685 (87) International publication number: WO 1988/008239 (20.10.1988 Gazette 1988/23)

(84) Designated Contracting States: DE FR GB IT SE (30) Priority: 08.04.1987 US 19870036566 (71) Applicant: HARMAN INTERNATIONAL INDUSTRIES, INCORPORATED Northridge California 91329 (US)	(72) Inventor: HOUSE, William, Neal Bloomington, IN 47401 (US) (74) Representative: Allen, William Guy Fairfax  J.A. KEMP & CO. 14, South Square Gray's Inn London WC1R 5LX London WC1R 5LX (GB)