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Yoshitoshi Osano

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  • Kanagawa, JP
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Patents Grantslast 30 patents

  • 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 7,815,385
    • 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 7,654,763
    • 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

    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 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