(19)

(11)

EP 0 313 638 A1

(12)

(43) Date of publication: 03.05.1989 Bulletin 1989/18 (21) Application number: 88904842.0 (22) Date of filing: 06.05.1988

(51) International Patent Classification (IPC):  A61N 1/ 30( . ) A61N 1/ 32( . ) (86) International application number: PCT/US1988/001483 (87) International publication number: WO 1988/008729 (17.11.1988 Gazette 1988/25)

(84) Designated Contracting States: CH DE FR GB IT LI NL (30) Priority: 15.05.1987 US 19870051079 (71) Applicant: NEWMAN, Martin H. Sharon, MA 02067 (US)	(72) Inventor: NEWMAN, Martin H. Sharon, MA 02067 (US) (74) Representative: Marlow, Nicholas Simon, et al  Reddie & Grose 16, Theobalds Road London WC1X 8PL London WC1X 8PL (GB)