TREA

Ippei Nakagawa

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  • Machida, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Composite seal
    • Patent number D822181
    • Issue date Jul 3, 2018
    • Nippon Valqua Industries, Ltd.
    • Ippei Nakagawa
    • D23 - Environmental heating and cooling
  • Information Patent Grant

    Composite sealing material
    • Patent number D754308
    • Issue date Apr 19, 2016
    • Nippon Valqua Industries, Ltd.
    • Ippei Nakagawa
    • D23 - Environmental heating and cooling
  • Information Patent Grant

    Gate valve seal
    • Patent number D633991
    • Issue date Mar 8, 2011
    • Nippon Valqua Industries, Ltd.
    • Ippei Nakagawa
    • D23 - Environmental heating and cooling