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(11)

EP 0 604 423 A1

(12)

(43) Date of publication: 06.07.1994 Bulletin 1994/27 (21) Application number: 92904723.0 (22) Date of filing: 17.09.1991

(51) International Patent Classification (IPC):  G02F 1/ 167( . ) G09G 3/ 34( . ) (86) International application number: PCT/US1991/006601 (87) International publication number: WO 1993/006585 (01.04.1993 Gazette 1993/09)

(84) Designated Contracting States: BE DE FR GB NL (71) Applicant: COPYTELE INC. Huntington Station New York 11746 (US)	(72) Inventors: DISANTO, Franck, J. North Hills, NY 11030 (US) KRUSOS, Denis, A. Lloyd Harbor, NY 11743 (US) LEWIT, Edward Roslyn Heights, NY 11577 (US) (74) Representative: Lucking, David John  FORRESTER & BOEHMERT Franz-Joseph-Strasse 38 D-80801 München D-80801 München (DE)