Patents by Inventor Yoshiro Okamoto

Yoshiro Okamoto 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).

  • Window antenna for a vehicle with dual feed points
    Patent number: 4727377
    Abstract: A pair of antenna elements are mounted on a glass of a rear quarter window of a vehicle. Feed points of these elements are provided at a corner portion of the window. One antenna element extends clockwise about the center of the window glass and the other antenna element extends counterclockwise thereabout from their corresponding feed points. The characteristics of both antenna elements significantly differ and complement each other. It is convenient for a diversity reception system. An auxiliary element branches from one antenna element to extend along the other antenna element. The auxiliary element compensates for impedance characteristics of the antenna elements to tune up reception characteristics thereof.
    Type: Grant
    Filed: May 15, 1986
    Date of Patent: February 23, 1988
    Assignees: Toyota Jidosha Kabushiki Kaisha, Nippon Sheet Glass Co., Ltd.
    Inventors: Hiroshi Yotsuya, Yoshiro Okamoto, Hiroshi Kondo, Kaoru Sakurai, Harunori Murakami, Hajime Murakami