TREA

Masashi OKA

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  • Chigasaki-shi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Optical fiber with connector
    • Patent number 9,958,620
    • Issue date May 1, 2018
    • Sei Optifrontier Co., Ltd.
    • Kenichiro Ohtsuka
    • G02 - OPTICS
  • Information Patent Grant

    Optical fiber with connector
    • Patent number 9,921,376
    • Issue date Mar 20, 2018
    • Sei Optifrontier Co., Ltd.
    • Kenichiro Ohtsuka
    • G02 - OPTICS
  • Information Patent Grant

    Optical fiber with connector
    • Patent number 9,804,344
    • Issue date Oct 31, 2017
    • Sei Optifrontier Co., Ltd.
    • Kenichiro Ohtsuka
    • G02 - OPTICS

Patents Applicationslast 30 patents