Patents by Inventor Kikuo Yamagami

Kikuo Yamagami 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).

  • Demagnetizing power source
    Patent number: 4462059
    Abstract: A demagnetizing power source for producing an attenuation alternating field to demagnetize a magnetized substance. This power source is provided with a memory circuit for sending actuating signals to a polarity changing-over circuit to change over the polarity of direct current supplied from a rectifying circuit to an exciting coil. In the memory circuit are stored a plurality of preset demagnetizing patterns. The polarity changing-over circuit changes over alternatively the polarity and gradually decreases the change-over cycle according to the selected demagnetizing pattern.
    Type: Grant
    Filed: October 7, 1981
    Date of Patent: July 24, 1984
    Assignee: Kanetsu Kogyo Kabushiki Kaisha
    Inventors: Kikuo Yamagami, Koji Yokoyama