Patents by Inventor Thomas C. Spindler

Thomas C. Spindler 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).

  • Alternating polarity power supply control apparatus
    Patent number: 4256979
    Abstract: An electronic switching circuit is provided for controlling transfer of electrical power from an alternating polarity electrical power supply to a load means through use of a field-effect transistor device as the primary power controlling element.
    Type: Grant
    Filed: December 26, 1978
    Date of Patent: March 17, 1981
    Assignee: Honeywell, Inc.
    Inventors: Thomas E. Hendrickson, Thomas C. Spindler