TREA

Shouji Anzai

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  • Saitama, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Double-chuck mechanical pencil
    • Patent number 6,517,272
    • Issue date Feb 11, 2003
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Double-chuck mechanical pencil
    • Patent number 6,517,271
    • Issue date Feb 11, 2003
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Double-chuck mechanical pencil
    • Patent number 5,988,913
    • Issue date Nov 23, 1999
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Double-chuck mechanical pencil
    • Patent number 5,947,620
    • Issue date Sep 7, 1999
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Bar extruding implement with ejector
    • Patent number 5,890,827
    • Issue date Apr 6, 1999
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Combined writing tool
    • Patent number 5,713,680
    • Issue date Feb 3, 1998
    • Crown Fancy Goods Co., Ltd.
    • Tokiyoshi Yoshino
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil with improved slider mechanism
    • Patent number 5,462,376
    • Issue date Oct 31, 1995
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES