An electronic program schedule system which includes a receiver for receiving broadcast, satellite or cablecast television programs for a plurality of television channels and a tuner for tuning a television receiver to a selected one of the plurality of channels. A data processor receives and stores...http://www.google.com.hk/patents/US6396546?utm_source=gb-gplus-share專利 US6396546 - Electronic television program guide schedule system and method
