(19)

(11)

EP 0 066 603 A1

(12)

(43) Date of publication: 15.12.1982 Bulletin 1982/50 (21) Application number: 82900205.0 (22) Date of filing: 27.11.1981

(51) International Patent Classification (IPC):  G01R 31/ 28( . ) (86) International application number: PCT/US1981/001592 (87) International publication number: WO 1982/002096 (24.06.1982 Gazette 1982/16)

(84) Designated Contracting States: AT CH DE FR GB LI LU NL SE (30) Priority: 15.12.1980 US 19800216763 (71) Applicant: IVAC CORPORATION San Diego, CA 92121 (US)	(72) Inventors: KREINICK, Stephen J. San Diego, CA 92122 (US) DENNY, Bradley J. San Marcos, CA 92069 (US)