Patents by Inventor Frederick M. Hulett

Frederick M. Hulett 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).

  • Electrosurgical generator
    Patent number: 4658819
    Abstract: An electrosurgical generator having a source of electrosurgical energy connected to a patient and including control circuitry for decreasing the output power from the source with increasing patient impedance, the rate of power decrease being substantially greater than that which would result if the output voltage from the source were maintained constant over the range of increasing patient impedance. The control circuitry may, in particular, decrease the output power over the range of increasing patient impedance in accordance with the square of the impedance.
    Type: Grant
    Filed: September 13, 1983
    Date of Patent: April 21, 1987
    Assignee: Valleylab, Inc.
    Inventors: Frank W. Harris, Frederick M. Hulett