Patents by Inventor Syouichi Takasuka

Syouichi Takasuka 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).

  • Semiconductor laser device
    Patent number: 6614743
    Abstract: A semiconductor laser device includes a semiconductor laser element, a light beam branching element for branching a light beam emitted from the semiconductor laser element and reflected by an optical recording medium into a plurality of light beams, a light beam reflector for reflecting the light beam branched by the light beam branching element, and a photodetector portion for detecting the light beam reflected by the light beam reflector. The light beam branching element and the photodetector portion are formed on the same substrate. The miniature semiconductor laser device can be assembled without complicated position adjustment and has less deterioration of characteristics arising from misregistration during and after assembly.
    Type: Grant
    Filed: November 9, 2000
    Date of Patent: September 2, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Naoki Nakanishi, Syouichi Takasuka, Shinichi Ijima, Hideyuki Nakanishi, Akio Yoshikawa