Patents by Inventor Yasuyuki Yokono

Yasuyuki Yokono 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).

  • Power semiconductor switching apparatus with heat sinks
    Patent number: 5006921
    Abstract: A semiconductor switching apparatus includes a member for radiating heat generated from semiconductor switching element chips and for reducing a thermal stress. The lengths of gate electrode wires are equally set. The semiconductor switching apparatus has a large capacity and good switching characteristics.
    Type: Grant
    Filed: March 31, 1989
    Date of Patent: April 9, 1991
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masaru Ishizuka, Yasuyuki Yokono, Asako Matsuura, Yoshio Kamei, Hiromichi Ohashi, Mitsuhiko Kitagawa, Tomiya Sasaki, Shigeki Monma