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Hatsuhiko Oikawa

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  • Chiyoda-ku, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Resistance spot welding method
    • Patent number 10,406,627
    • Issue date Sep 10, 2019
    • Nippon Steel Corporation
    • Hiroki Fujimoto
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Resistance spot welding method
    • Patent number 10,265,797
    • Issue date Apr 23, 2019
    • Nippon Steel & Sumitomo Metal Corporation
    • Hiroki Fujimoto
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Arc spot welded joint and manufacturing method thereof
    • Patent number 10,081,071
    • Issue date Sep 25, 2018
    • Nippon Steel & Sumitomo Metal Corporation
    • Seiji Furusako
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Spot welded joint
    • Patent number 10,081,073
    • Issue date Sep 25, 2018
    • Nippon Steel & Sumitomo Metal Corporation
    • Fuminori Watanabe
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Spot welding method of high-strength steel sheets excellent in join...
    • Patent number 10,040,145
    • Issue date Aug 7, 2018
    • Nippon Steel & Sumitomo Metal Corporation
    • Seiji Furusako
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Al-plated steel sheet used for hot pressing and method for manufact...
    • Patent number 9,970,116
    • Issue date May 15, 2018
    • Nippon Steel & Sumitomo Metal Corporation
    • Soshi Fujita
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Spot welded joint and spot welding method
    • Patent number 9,610,648
    • Issue date Apr 4, 2017
    • Nippon Steel & Sumitomo Metal Corporation
    • Hatsuhiko Oikawa
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Front body structure
    • Patent number 8,979,104
    • Issue date Mar 17, 2015
    • Nippon Steel & Sumitomo Metal Corporation
    • Toshiyuki Niwa
    • B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • Information Patent Grant

    Spot welded joint
    • Patent number 8,962,149
    • Issue date Feb 24, 2015
    • Nippon Steel & Sumitomo Metal Corporation
    • Hatsuhiko Oikawa
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Method and material for resistance welding steel-base metal sheet t...
    • Patent number 5,783,794
    • Issue date Jul 21, 1998
    • Nippon Steel Corporation
    • Hatsuhiko Oikawa
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

  • Information Patent Application

    Al-PLATED STEEL SHEET USED FOR HOT PRESSING AND METHOD FOR MANUFACT...
    • Publication number 20160362794
    • Publication date Dec 15, 2016
    • NIPPON STEEL & SUMITOMO METAL CORPORATION
    • Soshi FUJITA
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Application

    RESISTANCE SPOT WELDING METHOD
    • Publication number 20160228973
    • Publication date Aug 11, 2016
    • NIPPON STEEL & SUMITOMO METAL CORPORATION
    • Hiroki FUJIMOTO
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    ARC SPOT WELDED JOINT AND MANUFACTURING METHOD THEREOF
    • Publication number 20160158865
    • Publication date Jun 9, 2016
    • NIPPON STEEL & SUMITOMO METAL CORPORATION
    • Seiji FURUSAKO
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    SPOT WELDING METHOD OF HIGH-STRENGTH STEEL SHEETS EXCELLENT IN JOIN...
    • Publication number 20150174690
    • Publication date Jun 25, 2015
    • NIPPON STEEL & SUMITOMO METAL CORPORATION
    • Seiji Furusako
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    SPOT WELDED JOINT
    • Publication number 20150104243
    • Publication date Apr 16, 2015
    • NIPPON STEEL & SUMITOMO METAL CORPORATION
    • Fuminori Watanabe
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    SPOT WELDED JOINT AND SPOT WELDING METHOD
    • Publication number 20150001188
    • Publication date Jan 1, 2015
    • NIPPON STEEL & SUMITOMO METAL CORPORATION
    • Hatsuhiko OIKAWA
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    FRONT BODY STRUCTURE
    • Publication number 20140054872
    • Publication date Feb 27, 2014
    • Toshiyuki Niwa
    • B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • Information Patent Application

    SPOT WELDED JOINT AND SPOT WELDING METHOD
    • Publication number 20120141829
    • Publication date Jun 7, 2012
    • Hatsuhiko Oikawa
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR