(19)

(11)

EP 0 169 834 A1

(12)

(43) Date of publication: 05.02.1986 Bulletin 1986/06 (21) Application number: 84900616.0 (22) Date of filing: 30.01.1984

(51) International Patent Classification (IPC):  G09B 17/ 00( . ) G09B 19/ 08( . ) (86) International application number: PCT/EP1984/000020 (87) International publication number: WO 1985/003373 (01.08.1985 Gazette 1985/17)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (71) Applicants: Chen, Ai-Wen F-92200 Neuilly sur Seine (FR) ZHOU, Jing-Zi F-75011 Paris (FR) CHEN, Hsu-sen NL-Schiedam (NL) PAN, De-fu Wenchow (CN) CHEN, Wei-lie Shanghai (CN) CHEN, Jie F-75012 Paris (FR) CHEN, Shao-xue Wenchow (CN) CHEN, Shang-nong Wenchow (CN)	(72) Inventors: CHEN, Ai-wen F-92200 Neuilly-sur-Seine (FR) ZHOU, Jing-zi F-75011 Paris (FR)