Patents by Inventor Robert F. Youhas

Robert F. Youhas 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).

  • Protection circuit
    Patent number: 4408248
    Abstract: A protection circuit for communication equipment connected to a two conductor communication line includes a bridge rectifier having alternating current terminals connected to the conductors and to ground. The direct current terminals of the rectifier are connected to a device responsive to a range of predetermined voltage and current conditions in the conductors for reflecting foreign electrical energy.
    Type: Grant
    Filed: December 30, 1981
    Date of Patent: October 4, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Raymond M. Bulley, William F. MacPherson, Robert F. Youhas