Patents by Inventor Kenjiro Yokoyama

Kenjiro Yokoyama 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).

  • Heating apparatus with char detecting and heating controller
    Patent number: 4363957
    Abstract: A heating apparatus capable of heating an article to be heated accommodated within a heating chamber to a degree that the article becomes charred. Illumination intensity of reflected light from the surface of the article illuminated with visible light rays from a light source is detected by an optical sensor, to thereby identify the degree of charring produced in the article, wherein heating operation is controlled on the basis of the identified degree of charring.
    Type: Grant
    Filed: December 3, 1979
    Date of Patent: December 14, 1982
    Assignee: Hitachi Heating Appliances Co., Ltd.
    Inventors: Hajime Tachikawa, Mitsuru Watanabe, Kenjiro Yokoyama