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Youichi Nakazato

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  • Kawagoe, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Writing tool
    • Patent number 5,700,101
    • Issue date Dec 23, 1997
    • Kotobuki & Co., Ltd.
    • Shuhei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Writing tool
    • Patent number 5,683,191
    • Issue date Nov 4, 1997
    • Kotobuki & Co., Ltd.
    • Shuhei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Writing tool, with eraser dispenser
    • Patent number 5,370,471
    • Issue date Dec 6, 1994
    • Kotobuki & Co., Ltd.
    • Shubei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Writing tool for advancing lead with eraser dispenser
    • Patent number 5,236,270
    • Issue date Aug 17, 1993
    • Kotobuki & Co. Ltd.
    • Shuhei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Knock type mechanical pencil with retractable eraser
    • Patent number 5,207,522
    • Issue date May 4, 1993
    • Kotobuki & Co., Ltd.
    • Shuhei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Writing instrument
    • Patent number 5,090,831
    • Issue date Feb 25, 1992
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Latch mechanism for retractable writing instruments
    • Patent number 5,074,694
    • Issue date Dec 24, 1991
    • Kotobuki & Co., Ltd.
    • Youichi Nakazato
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Writing tool
    • Patent number 5,062,727
    • Issue date Nov 5, 1991
    • Kotobuki & Co., Ltd.
    • Shubei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Writing tool with eraser dispenser
    • Patent number 5,022,774
    • Issue date Jun 11, 1991
    • Kotobuki & Co., Ltd.
    • Shuhei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Writing instrument with eraser dispenser
    • Patent number 5,018,891
    • Issue date May 28, 1991
    • Kotobuko & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Clip actuated latch mechanism for retractable writing instruments
    • Patent number 4,973,179
    • Issue date Nov 27, 1990
    • Kotobuki & Co., Ltd.
    • Youichi Nakazato
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil
    • Patent number 4,957,384
    • Issue date Sep 18, 1990
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil having side push button actuated lead advance
    • Patent number 4,955,739
    • Issue date Sep 11, 1990
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES