(19)

(11)

EP 0 477 337 A1

(12)

(43) Date of publication: 01.04.1992 Bulletin 1992/14 (21) Application number: 91907866.0 (22) Date of filing: 08.04.1991

(51) International Patent Classification (IPC):  H04N 1/ 03( . ) H04N 1/ 113( . ) H04N 1/ 04( . ) H04N 1/ 12( . ) (86) International application number: PCT/US1991/002407 (87) International publication number: WO 1991/015794 (17.10.1991 Gazette 1991/24)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 06.04.1990 US 19900505940 (71) Applicant: S & R TECH DEVELOPMENT, INC. Monrovia, CA 91016 (US)	(72) Inventors: BRUEGGEMANN, Harry Paul San Marino, CA 91108 (US) SWANBERG, Melvin E. Claremont, CA 91711 (US) (74) Representative: Maggs, Michael Norman  Kilburn & Strode 30 John Street London WC1N 2DD London WC1N 2DD (GB)