TREA

Tadashi Yamamoto

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  • Kawagoe, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Eraser dispenser
    • Patent number 7,373,691
    • Issue date May 20, 2008
    • Kotobuki & Co., Ltd.
    • Tadashi Yamamoto
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Composite writing utensil
    • Patent number 7,080,949
    • Issue date Jul 25, 2006
    • Kotobuki & Co., Ltd.
    • Tadashi Yamamoto
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Composite holding device
    • Patent number 7,008,131
    • Issue date Mar 7, 2006
    • Kotobuki & Co., Ltd.
    • Hidehei Kagevarna
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Side-knock type mechanical pencil
    • Patent number 6,203,226
    • Issue date Mar 20, 2001
    • Kotobuki & Co., Ltd.
    • Takahiko Suzuki
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Writing instrument
    • Patent number 5,961,237
    • Issue date Oct 5, 1999
    • Kotobuki & Co., Ltd.
    • Shuhei 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

    Writing instrument
    • Patent number 5,810,496
    • Issue date Sep 22, 1998
    • Kotobuki & Co., Ltd.
    • Shuhei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Writing instrument with rotatable advancement and retraction
    • Patent number 5,547,301
    • Issue date Aug 20, 1996
    • Kotobuki & Co., Ltd.
    • Shuhei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Flat stick-shaped material propelling container
    • Patent number 5,362,166
    • Issue date Nov 8, 1994
    • Kotobuki & Co., Ltd.
    • Tadashi Yamamoto
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Writing implement with side actuator
    • Patent number 5,184,908
    • Issue date Feb 9, 1993
    • Kotobuki & Co., Ltd.
    • Tadashi Yamamoto
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Working out container of bar shaped article
    • Patent number 4,856,693
    • Issue date Aug 15, 1989
    • Kotobuki and Company, Ltd.
    • Shuhei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

  • Information Patent Application

    Eraser dispenser
    • Publication number 20050166362
    • Publication date Aug 4, 2005
    • Kotobuki & Co., Ltd.
    • Tadashi Yamamoto
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    Composite holding device
    • Publication number 20020085874
    • Publication date Jul 4, 2002
    • Hidehei Kagevarna
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES