Patents by Inventor Yukiyasu Negishi

Yukiyasu Negishi 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 fiber cable and process for production thereof
    Patent number: 4491386
    Abstract: An optical fiber cable is described comprising a linear center member having at least one longitudinal and spiral groove in the surface thereof, one coated optical fiber received in each groove, an outer sheath that encloses the center member, and a jelly-like material with which the space around each optical fiber is entirely filled. A process for producing such an optical fiber cable is also described.
    Type: Grant
    Filed: August 31, 1981
    Date of Patent: January 1, 1985
    Assignees: Nippon Telegraph & Telephone Public Corporation, Sumitomo Electric Industries, Ltd.
    Inventors: Yukiyasu Negishi, Yukinori Ishida, Yasunori Saito, Shigeru Tanaka