(19)

(11)

EP 0 327 577 A1

(12)

(43) Date of publication: 16.08.1989 Bulletin 1989/33 (21) Application number: 87907375.0 (22) Date of filing: 09.10.1987

(51) International Patent Classification (IPC):  G01R 29/ 12( . ) H03F 3/ 18( . ) H03F 3/ 45( . ) H03F 1/ 02( . ) H03F 3/ 217( . ) H03F 3/ 68( . ) (86) International application number: PCT/US1987/002622 (87) International publication number: WO 1988/002953 (21.04.1988 Gazette 1988/09)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 09.10.1986 US 19860917144 (71) Applicant: Monroe Electronics, Inc. Lyndonville New York 14098 (US)	(72) Inventor: COX, Mason, Forrest Shelby, NY 14103 (US) (74) Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät  Maximilianstrasse 58 D-80538 München D-80538 München (DE)