Patents by Inventor Tsutomu Fujioka

Tsutomu Fujioka 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).

  • Superconducting current limiting apparatus
    Patent number: 4994932
    Abstract: A superconducting current limiting apparatus includes a first container, a superconducting current limiting element accommodated in the first container, a refrigerant filling the first container for cooling the superconducting current limiting element accommodated in the first container, a second container for accommodating the first container in such a manner that the first container is heat insulated, and a conductor for connecting the superconducting current limiting element to an external power supply system. Such a superconducting current limiting apparatus can be used to limit a short-circuit current. It can be incorporated in a short circuit controlling superconducting system.
    Type: Grant
    Filed: January 26, 1990
    Date of Patent: February 19, 1991
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masaru Okamoto, Hitoshi Mizoguchi, Masayuki Ishikawa, Hisatoshi Ikeda, Katsumi Suzuki, Susumu Nishiwaki, Tsuneharu Teranishi, Satoru Yanabu, Tsutomu Fujioka