Patents by Inventor Shoichirou Kuwahara

Shoichirou Kuwahara 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 transmission system
    Patent number: 6559996
    Abstract: The present invention relates to an optical transmission system which reduces optical signal bandwidth with return-to-zero (RZ) signal.
    Type: Grant
    Filed: July 28, 1999
    Date of Patent: May 6, 2003
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Yutaka Miyamoto, Kazushige Yonenaga, Shoichirou Kuwahara