Patente US6377188 - Signal supplying and receiving system - Google PatentesB???squeda Im???genes Maps Play YouTube Noticias Gmail Drive M???s ??Iniciar sesi???n B???squeda avanzada de patentesPatentesAn audio signal supplying device for supplying signals to an operating panel for a passenger provided in each of for many seats of a moving vehicle, such as an aircraft or a train, in which the necess