Patents by Inventor Tugio Watanabe

Tugio Watanabe 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).

  • Lightning arrester device
    Patent number: 4136299
    Abstract: A grounded cylindrical metallic housing is hermetically closed at one end and an electric insulation hermetically extends through the other closed end of the housing to form in the housing a space filled with an electrically insulating gas. An arrester element disposed in the space has the incoming-line side connected to a terminal extended and sealed through the insulation and the ground side electrically connected to the housing. The incoming-line side of the arrester element is surrounded by both the insulation and a shield ring embedded therein.
    Type: Grant
    Filed: April 26, 1976
    Date of Patent: January 23, 1979
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Nobuo Nagai, Tugio Watanabe, Shoji Tada