Patents by Inventor Nagayuki Tsutsumi

Nagayuki Tsutsumi 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).

  • Package substation in tank with separate chambers
    Patent number: 4500935
    Abstract: The invention deals with a package substation in which a plurality of elements which constitute a substation are accommodated in a tank, the elements are isolated by separator walls which constitute accommodation chambers, and said accommodation chambers are filled with insulation fluids that are adapted to the elements which are accommodated in said accommodation chambers.
    Type: Grant
    Filed: August 26, 1982
    Date of Patent: February 19, 1985
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Keiji Tsuruta, Nagayuki Tsutsumi