(19)

(11)

EP 0 442 928 A1

(12)

(43) Date of publication: 28.08.1991 Bulletin 1991/35 (21) Application number: 89912491.0 (22) Date of filing: 10.11.1989

(51) International Patent Classification (IPC):  A61M 5/ 168( . ) (86) International application number: PCT/IT1989/000074 (87) International publication number: WO 1990/004986 (17.05.1990 Gazette 1990/11)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 11.11.1988 IT 19880022592 (71) Applicant: ZORZI, Ostilio I-20100 Milano (IT)	(72) Inventor: ZORZI, Ostilio I-20100 Milano (IT) (74) Representative: Filippi, Remo  Via Aldrovandi, 5 I-20129 Milano I-20129 Milano (IT)