Patents by Inventor Toshihiro Yokoo

Toshihiro Yokoo 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).

  • High-frequency induction heating apparatus
    Patent number: 5079399
    Abstract: A high-frequency induction heating apparatus of an inverter type includes a high-frequency oscillator using a plurality of switching elements turning on and off at a high speed. A control unit for controlling the high-frequency oscillator includes a plurality of driving circuits for driving the switching elements and a control circuit for controlling the respective driving circuits, and interconnection between the driving circuits and the control circuit is made by optical fiber cables so that influence by external electromagnetic induction is not effected to operate the high-frequency induction heating apparatus effectively.
    Type: Grant
    Filed: August 6, 1990
    Date of Patent: January 7, 1992
    Assignee: Denki Kogyo Co., Ltd.
    Inventors: Hiroshi Itoh, Toshihiro Yokoo