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Hirotake Izawa

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  • Kanagawa, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Mechanical pencil
    • Patent number 9,669,649
    • Issue date Jun 6, 2017
    • Mitsubishi Pencil Company, Limited
    • Hirotake Izawa
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil
    • Patent number 9,358,828
    • Issue date Jun 7, 2016
    • Mitsubishi Pencil Company, Limited
    • Hirotake Izawa
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil
    • Patent number 9,302,529
    • Issue date Apr 5, 2016
    • Mitsubishi Pencil Co., Ltd.
    • Hirotake Izawa
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil
    • Patent number 8,337,107
    • Issue date Dec 25, 2012
    • Mitsubishi Pencil Co., Ltd.
    • Norio Ohsawa
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil
    • Patent number 8,328,446
    • Issue date Dec 11, 2012
    • Mitsubishi Pencil Co., Ltd.
    • Hirotake Izawa
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil
    • Patent number 7,850,380
    • Issue date Dec 14, 2010
    • Mitsubishi Pencil Co., Ltd.
    • Hirotake Izawa
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil
    • Patent number 7,850,381
    • Issue date Dec 14, 2010
    • Mitsubishi Pencil Co., Ltd.
    • Hirotake Izawa
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil
    • Patent number 7,815,385
    • Issue date Oct 19, 2010
    • Mitsubishi Pencil Co., Ltd.
    • Hirotake Izawa
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil
    • Patent number 7,806,615
    • Issue date Oct 5, 2010
    • Mitsubishi Pencil Co., Ltd.
    • Hirotake Izawa
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil
    • Patent number 7,802,936
    • Issue date Sep 28, 2010
    • Mitsubishi Pencil Co., Ltd.
    • Hirotake Izawa
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil
    • Patent number 7,654,763
    • Issue date Feb 2, 2010
    • Mitsubishi Pencil Co., Ltd.
    • Hirotake Izawa
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

  • Information Patent Application

    WRITING IMPLEMENT
    • Publication number 20240051329
    • Publication date Feb 15, 2024
    • MITSUBISHI PENCIL COMPANY, LIMITED
    • Hirotake IZAWA
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    FIBER-BUNDLED PART FOR WRITING INSTRUMENTS, AND PEN TIP AND WRITING...
    • Publication number 20230406029
    • Publication date Dec 21, 2023
    • MITSUBISHI PENCIL COMPANY, LIMITED
    • Toshihiro TAKAHASHI
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    WRITING IMPLEMENT
    • Publication number 20220324250
    • Publication date Oct 13, 2022
    • MITSUBISHI PENCIL COMPANY, LIMITED
    • Hirotake IZAWA
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    MECHANICAL PENCIL
    • Publication number 20150050061
    • Publication date Feb 19, 2015
    • MITSUBISHI PENCIL COMPANY, LIMITED
    • Hirotake Izawa
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    MECHANICAL PENCIL
    • Publication number 20150023714
    • Publication date Jan 22, 2015
    • MITSUBISHI PENCIL COMPANY, LIMITED
    • Hirotake Izawa
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    MECHANICAL PENCIL
    • Publication number 20140016982
    • Publication date Jan 16, 2014
    • Mitsubishi Pencil Co., Ltd.
    • Hirotake Izawa
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    MECHANICAL PENCIL
    • Publication number 20110002728
    • Publication date Jan 6, 2011
    • Mitsubishi Pencil Co., Ltd.
    • Hirotake Izawa
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    MECHANICAL PENCIL
    • Publication number 20100322695
    • Publication date Dec 23, 2010
    • Mitsubishi Pencil Co., Ltd.
    • Norio Ohsawa
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    MECHANICAL PENCIL
    • Publication number 20100266325
    • Publication date Oct 21, 2010
    • Mitsubishi Pencil Co., Ltd.
    • Hirotake Izawa
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    MECHANICAL PENCIL
    • Publication number 20100254746
    • Publication date Oct 7, 2010
    • Mitsubishi Pencil Co., Ltd.
    • Hirotake Izawa
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    MECHANICAL PENCIL
    • Publication number 20100239351
    • Publication date Sep 23, 2010
    • Mitsubishi Pencil Co., Ltd.
    • Hirotake Izawa
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    MECHANICAL PENCIL
    • Publication number 20100232863
    • Publication date Sep 16, 2010
    • Mitsubishi Pencil Co., Ltd.
    • Hirotake Izawa
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    MECHANICAL PENCIL
    • Publication number 20100166486
    • Publication date Jul 1, 2010
    • MITSUBISHI PENCIL CO.,LTD.
    • Hirotake Izawa
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    Mechanical Pencil
    • Publication number 20090180824
    • Publication date Jul 16, 2009
    • Mitsubishi Pencil Co., Ltd.
    • Hirotake Izawa
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES