Patents by Inventor Masamichi Sakamoto

Masamichi Sakamoto 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).

  • Combination refractive index-guiding type and a gain-guiding type semiconductor laser device
    Patent number: 4606033
    Abstract: A semiconductor laser device having a light emission region of a stripe pattern formed on a flat active layer, a portion carrying out a refractive index-guiding function formed on the light end portion of the light emission region and a portion carrying out a gain-guiding function formed inside the end portion of the light emission region.
    Type: Grant
    Filed: September 26, 1983
    Date of Patent: August 12, 1986
    Assignee: Sony Corporation
    Inventor: Masamichi Sakamoto