Patents by Inventor Mary J. Heitzman

Mary J. Heitzman 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).

  • Rethermalization pass through oven system
    Patent number: 5897807
    Abstract: A pass through oven system using a microwave oven with doors and a conveyor belt passing through the oven cavity. A sensor system detects the food item on the conveyor belt and identifies the food item. A controller in response to the sensor system moves the conveyor so that the food item is positioned within the cavity of the microwave oven, automatically engages the oven for a preset duration depending upon the identity of the food item and then moves the conveyor to remove the food item from the cavity.
    Type: Grant
    Filed: September 8, 1997
    Date of Patent: April 27, 1999
    Assignee: Amana Company, L.P.
    Inventors: Richard H. Edgar, Larry M. Engebritson, Mary J. Heitzman, J. Scott Petty, Nelson J. Ferragut