TREA

Akio Kawana

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  • Komae, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Single mode optical fibers
    • Patent number 4,525,027
    • Issue date Jun 25, 1985
    • Nippon Telegraph and Telephone Public Corp.
    • Katsunari Okamoto
    • G02 - OPTICS
  • Information Patent Grant

    Single mode optical fibers
    • Patent number 4,372,647
    • Issue date Feb 8, 1983
    • Nippon Telegraph & Telephone Public Corporation
    • Katsunari Okamoto
    • G02 - OPTICS