VIDEOTEX/TELETEXT TRANSMISSION AND RECEPTION EQUIPMENT COMPRISING SIGNAL MULTIPLEXERS, DEMODULATORS, MODEMS, TERMINALS AND KEYBOARDS

TRANSMITTING AND REPRODUCING FOR DISPLAY OF ALPHANUMERICAL AND GRAPHICAL INFORMATION AT DISTANT LOCATIONS FOR A VARIETY OF USES, ESPECIALLY BY CONSUMERS; SERVICES FOR TRANSMITTING DATA SIGNALS BEING INTERMIXED WITH COMMERCIAL TELEVISION SIGNALS