Patents by Inventor Heroe Yamamoto

Heroe Yamamoto 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).

  • Superconductive coil system with protecting device
    Patent number: 4393429
    Abstract: A superconductive coil has both its terminals connected in parallel with a protecting device which has a diode and a unipolar d.c. motor connected in series with each other. The superconductive coil is further connected with an energizing d.c. power source through a switch. The conductive direction of the diode is so selected that the d.c. motor is driven by the energizing energy of the superconductive coil when the switch is opened in the quenching operation of the superconductive coil.
    Type: Grant
    Filed: April 24, 1981
    Date of Patent: July 12, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Naoki Maki, Seiji Numata, Kiyoshi Yamaguchi, Heroe Yamamoto