A digital remote control system provides substantially simultaneous actuation of remote functions. Repetitive transmissions of a plurality of remote control instructions and an identifier pattern are compared in an associated remote control receiver to verify authenticity of received signals. Transmitted...http://www.google.es/patents/US3987414?utm_source=gb-gplus-sharePatente US3987414 - Digital remote control for electronic signal receivers
Digital remote control for electronic signal receivers
