Patents by Inventor Shinji Kaneiwa

Shinji Kaneiwa 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).

  • Optical element in semiconductor laser device having a diffraction grating and improved resonance characteristics
    Patent number: 4658403
    Abstract: The disclosure is directed to an improved semiconductor laser device which includes a first light deriving optical waveguide connected approximately perpendicularly to a light exit face at one side, a second light deriving optical waveguide connected approximately perpendicularly to another light exit face at the other side and having an optical axis different from that of the first light deriving optical waveguide, and a light emitting optical waveguide subjected to optical coupling with a periodical diffraction grating for optical resonance, and connected to end portions of the first and second light deriving optical waveguides within the semiconductor laser device.
    Type: Grant
    Filed: October 31, 1984
    Date of Patent: April 14, 1987
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Haruhisa Takiguchi, Shinji Kaneiwa, Sadayoshi Matsui, Mototaka Taneya