Patents by Inventor Robert L. Ellis

Robert L. Ellis 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).

  • Constant power microwave oven
    Patent number: 4420668
    Abstract: An apparatus and method for controlling cooking in a microwave oven whereby the power input to the cooking cavity is held at a predetermined, constant level. Available line power is measured through a winding or tap on the high voltage transformer secondary and the duty cycle of the magnetron power supply is adjusted to maintain a constant average power output.
    Type: Grant
    Filed: June 25, 1981
    Date of Patent: December 13, 1983
    Assignee: Litton Systems, Inc.
    Inventors: Gerald L. Larson, Robert L. Ellis, Daniel A. Baker