(19)

(11)

EP 0 466 883 A1

(12)

(43) Date of publication: 22.01.1992 Bulletin 1992/04 (21) Application number: 91903405.0 (22) Date of filing: 30.01.1991

(51) International Patent Classification (IPC):  A61F 9/ 02( . ) G02C 9/ 00( . ) (86) International application number: PCT/GB1991/000139 (87) International publication number: WO 1991/011159 (08.08.1991 Gazette 1991/18)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 03.02.1990 GB 19900002447 29.06.1990 GB 19900014573 (71) Applicant: HELLBERG INTERNATIONAL LIMITED Ronaldsway Airport, Isle of Man (GB)	(72) Inventor: KORNY, Kazimierez Jan Maughold, Isle of Man (GB) (74) Representative: Lyons, Andrew John  ROYSTONS Tower Building Water Street Liverpool L3 1BA Liverpool L3 1BA (GB)