Patents by Inventor Sakae Imamura

Sakae Imamura 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).

  • Monitoring equipment for optical digital communications
    Publication number: 20030081551
    Abstract: The object of the present invention is to realize monitoring equipment for optical digital communications which can measure the quality of or acquire data in communication networks without reducing the optical power in communication networks.
    Type: Application
    Filed: September 26, 2002
    Publication date: May 1, 2003
    Applicant: YOKOGAWA ELECTRIC CORPORATION,
    Inventors: Hiroshi Yazaki, Kazuo Nagata, Toshiya Mizuta, Sakae Imamura