Patents by Inventor Takayoshi Hatanaka

Takayoshi Hatanaka 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 uneven bottom wall oven cavity
    Patent number: 4225767
    Abstract: A microwave oven comprises a source of microwave energy for heating a food, a table for carrying the food, and an oven cavity with an uneven bottom wall for providing random reflection of the microwave energy wherein a distance between the uneven bottom wall of the oven cavity and the table is variable because of the uneven bottom to unify the intensity of the microwave energy throughout the oven cavity, whereby the food positioned on the table is exposed to uniform intensity of the microwave energy.
    Type: Grant
    Filed: November 2, 1978
    Date of Patent: September 30, 1980
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takayoshi Hatanaka, Tsuguharu Yakushiji, Kanji Tanaka