(19)

(11)

EP 0 112 869 A1

(12)

(43) Date of publication: 11.07.1984 Bulletin 1984/28 (21) Application number: 83902080.0 (22) Date of filing: 29.06.1983

(51) International Patent Classification (IPC):  H04K 1/ 02( . ) H04N 7/ 173( . ) H04N 7/ 16( . ) (86) International application number: PCT/AU1983/000086 (87) International publication number: WO 1984/000264 (19.01.1984 Gazette 1984/02)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 29.06.1982 AU 19820004631 (71) Applicant: IVACHEV, Alex Mt. Lawley, W.A. 6050 (AU)	(72) Inventor: IVACHEV, Alex Mt. Lawley, W.A. 6050 (AU) (74) Representative: Matthews, Howard Nicholas  Page Hargrave 2 Tower Street London WC2H 9NP London WC2H 9NP (GB)