Patents by Inventor Donald W. Judson

Donald W. Judson 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).

  • Patent number: 3964487
    Abstract: A high frequency signal for cutting human tissue is generated by common-emitter configured oscillator circuit that is adapted to maintain the cutting signal relatively constant in spite of impedance variations in the load caused by variations in the conduction of the tissue being cut.
    Type: Grant
    Filed: December 9, 1974
    Date of Patent: June 22, 1976
    Assignee: The Birtcher Corporation
    Inventor: Donald W. Judson