Patents by Inventor Yasuro Furui

Yasuro Furui 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).

  • Single-mode optical fiber
    Patent number: 4306767
    Abstract: The invention relates to a single-mode optical fiber used in a long wavelength band range for optical telecommunication. The core and the cladding of this optical fiber contain P.sub.2 O.sub.5 as a dopant selected to lower the deposition temperature and to hasten the deposition speed so as to result in low absorption loss.
    Type: Grant
    Filed: November 7, 1979
    Date of Patent: December 22, 1981
    Assignees: Nippon Telegraph & Telephone Public Corporation, The Furukawa Electric Co., Ltd.
    Inventors: Masao Kawachi, Tadashi Miyashita, Shintaro Sentsui, Yasuro Furui, Toshiaki Kuroha