(19)

(11)

EP 0 512 058 A1

(12)

(43) Date of publication: 11.11.1992 Bulletin 1992/46 (21) Application number: 91904210.0 (22) Date of filing: 15.01.1991

(51) International Patent Classification (IPC):  A61B 5/ 00( . ) A61N 1/ 372( . ) A61N 1/ 37( . ) (86) International application number: PCT/US1991/000309 (87) International publication number: WO 1991/010471 (25.07.1991 Gazette 1991/17)

(84) Designated Contracting States: DE FR GB IT NL SE (30) Priority: 22.01.1990 US 19900468407 (71) Applicant: MEDTRONIC, INC. Minneapolis, Minnesota 55432-3576 (US)	(72) Inventors: WYBORNY, Paul, B. Fridley, MN 55432 (US) ROLINE, Glenn, M. Anoka, MN 55303 (US) NICHOLS, Lucy, M. Maple Grove, MN 55369 (US) THOMPSON, David, L. Fridley, MN 55432 (US) (74) Representative: Tomlinson, Kerry John  Frank B. Dehn & Co. European Patent Attorneys Imperial House 15-19 Kingsway London W1P 5HH London W1P 5HH (GB)