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Hiroki Onuma

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  • Hadano-shi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Hollow poppet valve
    • Patent number 9,689,506
    • Issue date Jun 27, 2017
    • Nittan Valve Co., Ltd.
    • Koichi Homma
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Hollow poppet valve
    • Patent number 9,175,788
    • Issue date Nov 3, 2015
    • Nittan Valve Co., Ltd.
    • Hiroki Onuma
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

  • Information Patent Application

    HOLLOW POPPET VALVE
    • Publication number 20150240675
    • Publication date Aug 27, 2015
    • NITTAN VALVE CO., LTD.
    • Koichi Homma
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Application

    HOLLOW POPPET VALVE
    • Publication number 20140352803
    • Publication date Dec 4, 2014
    • NITTAN VALVE CO., LTD.
    • Hiroki Onuma
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...