Patents by Inventor Martha Demmer

Martha Demmer 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).

  • Microwave oven having integral mixing assembly
    Patent number: 5021621
    Abstract: The invention provides a microwave oven having an integral mixing assembly for agitating food inside of the microwave chamber during cooking. The mixing assembly includes a mixer shaft which is received through the top microwave chamber wall and which is capable of rotational movement. The mixer shaft is powered for rotational movement by a motor. The end of the mixer shaft disposed inside of the microwave chamber is adapted for releasable connection to one or more stirring or agitating means. A belt drive system and support mechanism are provided to control rotation of the mixer shaft.
    Type: Grant
    Filed: April 17, 1990
    Date of Patent: June 4, 1991
    Inventors: Martha Demmer, Thomas Talboys