Patents by Inventor Takao Ohiwa

Takao Ohiwa 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).

  • Method of manufacturing multilayered printed-wiring-board
    Patent number: 5031308
    Abstract: A method of manufacturing a mutilayered printed-wiring-board comprises attaching conductive members on conductive layers, superimposing a plurality of printed-wiring boards, and electrically connecting the conductive layers with one another by the conductive members.
    Type: Grant
    Filed: December 26, 1989
    Date of Patent: July 16, 1991
    Assignee: Japan Radio Co., Ltd.
    Inventors: Kazuo Yamashita, Eiki Takahashi, Osamu Teshigawara, Masaki Kinoshita, Takeshi Eimura, Takao Ohiwa
  • Optical fiber cathode ray tubes and copy machines using the same
    Patent number: 4141642
    Abstract: An improved optical fiber cathode ray tube is provided which enables the recording of images on a recording medium with a high resolution even if the recording medium is disposed with an increased gap between the tube and the recording medium to prevent mechanical contact therebetween. The tube is provided with an additional stack of optical fibers facing the optical fiber face plate of the cathode ray tube with a light transparent thin layer being interposed between the face plate and the additional stack. The transparent thin layer may be a transparent plate and/or air gap. The stack of optical fibers may be in a form of an optical fiber plate or bundle.
    Type: Grant
    Filed: July 1, 1977
    Date of Patent: February 27, 1979
    Assignee: Japan Radio Company, Ltd.
    Inventors: Kiyoshi Nagai, Hiroshi Ohashi, Takao Ohiwa