(19)

(11)

EP 0 651 657 A1

(12)

(43) Date of publication: 10.05.1995 Bulletin 1995/19 (21) Application number: 93917911.0 (22) Date of filing: 23.07.1993

(51) International Patent Classification (IPC):  A61L 2/ 10( . ) (86) International application number: PCT/GB1993/001569 (87) International publication number: WO 1994/002180 (03.02.1994 Gazette 1994/04)

(84) Designated Contracting States: BE DE FR IE NL SE (30) Priority: 24.07.1992 GB 19920015743 (71) Applicants: NORMAN PENDRED AND COMPANY LIMITED London SE6 4NU (GB) FRACTAL INC. Clackamas, OR 97015 (US)	(72) Inventor: PENDRED, Christopher John Limpsfield Chart, Limpsfield, Surrey RH8 (GB) (74) Representative: Britter, Keith Palmer, et al  Britter & Co. Barn West, The Dixies, High Street, Ashwell Baldock Hertfordshire SG7 5NT Baldock Hertfordshire SG7 5NT (GB)