TREA

Koichi Nakajima

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Plastic watch case
    • Patent number 4,291,402
    • Issue date Sep 22, 1981
    • Citizen Watch Co., Ltd.
    • Koichi Nakajima
    • G04 - HOROLOGY
  • Information Patent Grant

    Wristwatch case
    • Patent number 4,186,552
    • Issue date Feb 5, 1980
    • Citizen Watch Co., Ltd.
    • Hisao Ishigaki
    • G04 - HOROLOGY