Patents by Inventor Tsugunori Okumura

Tsugunori Okumura 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
    Patent number: 4648095
    Abstract: Solid phase reaction products are employed as reflecting planes of a semiconductor laser facing each other with an active layer in between, which significantly improve its performance and productivity.
    Type: Grant
    Filed: July 24, 1984
    Date of Patent: March 3, 1987
    Assignees: Furukawa Electric Co., Ltd., Toshiaki Ikoma, Tsugunori Okumura
    Inventors: Tamotsu Iwasaki, Toshiaki Ikoma, Tsugunori Okumura