TREA

Yasuyuki Sugawara

Follow

Person

  • Sakura, JP
People

Patents Grantslast 30 patents

  • Information Patent Grant

    Optical fiber
    • Patent number 4,679,899
    • Issue date Jul 14, 1987
    • Fujikura Ltd.
    • Toshiaki Kobayashi
    • C03 - GLASS MINERAL OR SLAG WOOL
  • Information Patent Grant

    Optical fiber for communication
    • Patent number 4,114,981
    • Issue date Sep 19, 1978
    • Nippon Telegraph and Telephone Public Corporation
    • Yukinori Ishida
    • G02 - OPTICS