(19)

(11)

EP 0 425 617 A1

(12)

(43) Date of publication: 08.05.1991 Bulletin 1991/19 (21) Application number: 90906740.0 (22) Date of filing: 30.04.1990

(51) International Patent Classification (IPC):  A61D 7/ 00( . ) (86) International application number: PCT/AU1990/000168 (87) International publication number: WO 1990/013270 (15.11.1990 Gazette 1990/26)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 01.05.1989 AU 19890003956 (71) Applicant: McKEDDIE, David John St. Ives, NSW 2075 (AU)	(72) Inventor: McKEDDIE, David John St. Ives, NSW 2075 (AU) (74) Representative: Netter, André, et al  Cabinet NETTER, 40, rue Vignon F-75009 Paris F-75009 Paris (FR)