A conventional "Touch-Tone" telephone instrument is rendered functional in the same manner and to the same extent as a computer terminal having alpha-numeric capability, as regards transmission of queries directed to computerized data bases. It is also rendered functional as a recipient of information...http://www.google.fr/patents/US4817129?utm_source=gb-gplus-shareBrevet US4817129 - Method of and means for accessing computerized data bases utilizing a touch-tone telephone instrument
Method of and means for accessing computerized data bases utilizing a touch ...
