(19)

(11)

EP 0 832 522 A1

(12)

(43) Date of publication: 01.04.1998 Bulletin 1998/14 (21) Application number: 96918108.0 (22) Date of filing: 05.06.1996

(51) International Patent Classification (IPC):  H01H 50/ 02( . ) H04B 3/ 54( . ) (86) International application number: PCT/US1996/008941 (87) International publication number: WO 1996/041428 (19.12.1996 Gazette 1997/03)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 07.06.1995 US 19950479474 (71) Applicant: NATIONAL DIGITAL ELECTRONICS, INC. Dallas, Texas 75244-5136 (US)	(72) Inventor: MODGIL, O., S. Plano, TX 75075 (US) (74) Representative: Harris, Ian Richard  D. Young & Co., 21 New Fetter Lane London EC4A 1DA London EC4A 1DA (GB)