Patents by Inventor Philippe P. Bertholon

Philippe P. Bertholon has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Telephone transmission installation between interlocutors in a noisy environment
    Patent number: 4243837
    Abstract: An arrangement for controlling a telephone transmission line having an input linked to a sound detection device located in a noisy environment. The transmission line operates only for the transmission of words received by the sound detection device. The transmission line is made operative or inoperative according to whether sound energy variation collected by the sound detection device for duration of a predetermined time interval is superior or inferior to a predetermined approximate audio level.
    Type: Grant
    Filed: August 15, 1978
    Date of Patent: January 6, 1981
    Assignee: Electronique Marcel Dassault
    Inventor: Philippe P. Bertholon