(19)

(11)

EP 0 259 338 A1

(12)

(43) Date of publication: 16.03.1988 Bulletin 1988/11 (21) Application number: 86904036.0 (22) Date of filing: 23.06.1986

(51) International Patent Classification (IPC):  A61M 21/ 00( . ) H04R 1/ 02( . ) (86) International application number: PCT/AU1986/000181 (87) International publication number: WO 1987/004934 (27.08.1987 Gazette 1987/19)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 21.02.1986 AU 19860004729 (71) Applicant: SABLEQUEST PTY.LTD. Southport, QLD 4215 (AU)	(72) Inventor: HUGHES, John, Stewart Sorrento, QLD 4217 (AU)