Patents by Inventor Robert D. Washgurn

Robert D. Washgurn 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).

  • N-phase sinewave converter
    Patent number: 4972309
    Abstract: A DC to AC sinewave converter having an FET with its gate terminal coupled to a switching signal which turns the FET on and off. A pair of parallel, oppositely conductive diodes couples the drain terminal of the FET to a resonant circuit that is responsive to a source of DC voltage. A clamping diode is connected between the parallel diodes and the source terminal of the FET for preventing the drain and source terminals from being reverse biased.
    Type: Grant
    Filed: March 14, 1989
    Date of Patent: November 20, 1990
    Assignee: Hughes Aircraft Company
    Inventors: Robert D. Washgurn, Jerry C. Sze, Carlos H. Gonzalez, Robert F. McClanahan, David M. Lusher