Patents by Inventor Eiichi Zaima

Eiichi Zaima 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).

  • Method and apparatus for detecting foreign matters in gas sealed electric apparatus
    Patent number: 4231258
    Abstract: In a method for detecting foreign matters present in gas sealed electrical apparatus including a tank at the ground potential and containing an insulating gas and a high voltage live part disposed in the tank, a voltage is applied to the high voltage live part causing generation of ultrasonic waves and the ultrasonic waves propagated through the tank is sensed by a sensing element mounted on the tank.
    Type: Grant
    Filed: January 2, 1979
    Date of Patent: November 4, 1980
    Assignees: Tokyo Shibaura Denki Kabushiki Kaisha, Tokyo Denryoku Kabushiki Kaisha
    Inventors: Shinichi Menju, Kunio Takahashi, Eiichi Haginomori, Yoichi Murakami, Eiichi Zaima