(19)

(11)

EP 0 469 001 A1

(12)

(43) Date of publication: 05.02.1992 Bulletin 1992/06 (21) Application number: 90906025.0 (22) Date of filing: 26.03.1990

(51) International Patent Classification (IPC):  H03J 7/ 08( . ) H04B 1/ 26( . ) H04B 1/ 18( . ) H04W 88/ 02( . ) (86) International application number: PCT/US1990/001594 (87) International publication number: WO 1990/011653 (04.10.1990 Gazette 1990/23)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 28.03.1989 US 19890329543 18.07.1989 US 19890381483 18.07.1989 US 19890381527 (71) Applicant: TELEFIND CORPORATION Coral Gables, FL 33134 (US)	(72) Inventors: ANDROS, Andrew, A. Spring, TX 77379 (US) CAMPANA, Thomas, J., Jr. Chicago, IL 60652 (US) (74) Representative: Williams, Trevor John  J.A. KEMP & CO. 14 South Square Gray's Inn London WC1R 5EU London WC1R 5EU (GB)