Patents by Inventor Kunihara Takizawa

Kunihara Takizawa 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).

  • Bidirectional light transmission system and optical device therefor
    Patent number: 5361157
    Abstract: A bidirectional light transmission system comprises a transmitting station having a light source for intensity-modulating a transmission signal, a first light branching portion for branching intensity-modulated light of the light source in a predetermined ratio and a first light receiving portion, and a receiving station having a second light branching portion, a light phase-modulating portion, a light reflecting portion and a second light receiving portion.
    Type: Grant
    Filed: August 25, 1992
    Date of Patent: November 1, 1994
    Assignee: Nippon Hoso Kyokai
    Inventors: Tadasu Ishikawa, Mikio Maeda, Kimiyuki Oyamada, Shuichi Fujisawa, Yozo Utsumi, Kunihara Takizawa