Patents by Inventor Yoshihiro Shirasaka

Yoshihiro Shirasaka 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).

  • Light-driven semiconductor device
    Patent number: 4368481
    Abstract: A light-driven semiconductor device comprises an optical fiber having an output end located in the vicinity of a light sensitive area of a light trigger thyristor and a silicone rubber interposed between the output end of said light guide and the light sensitive area and pressed against said light sensitive area by said output end, whereby said output end is located relatively to said light sensitive area and a light signal emitted from said output end is led to said light sensitive area.
    Type: Grant
    Filed: June 10, 1980
    Date of Patent: January 11, 1983
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Hiromichi Ohashi, Yoshihiro Shirasaka