(19)

(11)

EP 0 340 265 A1

(12)

(43) Date of publication: 08.11.1989 Bulletin 1989/45 (21) Application number: 88909276.0 (22) Date of filing: 28.10.1988

(51) International Patent Classification (IPC):  H04R 1/ 30( . ) (86) International application number: PCT/AU1988/000420 (87) International publication number: WO 1989/004581 (18.05.1989 Gazette 1989/11)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 12.11.1987 GB 19870026489 (71) Applicant: GRUNBERG, Robert, Michael Bellvue Hill, NSW 2033 (AU)	(72) Inventor: GRUNBERG, Robert, Michael Bellvue Hill, NSW 2033 (AU) (74) Representative: Livsey, Gilbert Charlesworth Norris  HYDE, HEIDE & O'DONNELL 10-12 Priest's Bridge London SW15 5JE London SW15 5JE (GB)