TREA

Kei HIRAI

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method for forming rustproof film on PC strand and PC strand
    • Patent number 8,882,944
    • Issue date Nov 11, 2014
    • Kurosawa Construction Co., Ltd.
    • Ryohei Kurosawa
    • B05 - SPRAYING OR ATOMISING IN GENERAL APPLYING LIQUIDS OR OTHER FLUENT MATER...
  • Information Patent Grant

    Double rustproof PC strand
    • Patent number 8,833,050
    • Issue date Sep 16, 2014
    • Kurosawa Construction Co., Ltd.
    • Ryohei Kurosawa
    • D07 - ROPES CABLES OTHER THAN ELECTRIC
  • Information Patent Grant

    Method for forming rustproof film on a PC strand
    • Patent number 8,191,251
    • Issue date Jun 5, 2012
    • Kurosawa Construction Co., Ltd.
    • Ryohei Kurosawa
    • B05 - SPRAYING OR ATOMISING IN GENERAL APPLYING LIQUIDS OR OTHER FLUENT MATER...

Patents Applicationslast 30 patents