TREA

Koji Hirai

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Membrane for key switch and the key switch
    • Patent number 7,205,491
    • Issue date Apr 17, 2007
    • Fujikura Ltd.
    • Masahiro Kaizu
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Diaphragm for a switch
    • Patent number D496337
    • Issue date Sep 21, 2004
    • Fujikura Ltd.
    • Masahiro Kaizu
    • D13 - Equipment for production, distribution, or transformation of energy

Patents Applicationslast 30 patents