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  • B43K21/20
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Parent Industries

BPERFORMING OPERATIONS TRANSPORTING B43Writing accessories B43KIMPLEMENTS FOR WRITING OR DRAWING B43K21/00Propelling pencils

Current Industry

B43K21/20with writing-cores automatically replaced from magazines
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Mechanical pencil
    • Patent number 10,603,948
    • Issue date Mar 31, 2020
    • Kotobuki & Co., Ltd.
    • Tadao Odaka
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • 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

    Side knock type mechanical pencil
    • Patent number 6,210,058
    • Issue date Apr 3, 2001
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Side knock-type mechanical pencil
    • Patent number 6,099,182
    • Issue date Aug 8, 2000
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil
    • Patent number 6,082,916
    • Issue date Jul 4, 2000
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Writing instrument
    • Patent number 6,039,484
    • Issue date Mar 21, 2000
    • 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

    Dispenser for selectively extending and retracting a substantially...
    • Patent number 5,961,236
    • Issue date Oct 5, 1999
    • Kotobuki & Co.
    • Shuhei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Dispenser for selectively extending and retracting a substantially...
    • Patent number 5,927,882
    • Issue date Jul 27, 1999
    • Kotobuki Co., Ltd.
    • Shuhei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Side knock-type mechanical pencil
    • Patent number 5,882,132
    • Issue date Mar 16, 1999
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Writing tool
    • Patent number 5,846,009
    • Issue date Dec 8, 1998
    • Kotobuki & Co., Ltd.
    • Yoshio Noguchi
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Side knock type mechanical pencil
    • Patent number 5,836,707
    • Issue date Nov 17, 1998
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil
    • Patent number 5,826,999
    • Issue date Oct 27, 1998
    • Kotobuki & Co., Ltd.
    • Shuhei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Side knock type mechanical pencil
    • Patent number 5,791,797
    • Issue date Aug 11, 1998
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Side knock type mechanical pencil
    • Patent number 5,702,193
    • Issue date Dec 30, 1997
    • Kotobuki & Co.,Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil with lead-feeding device operable by forward shake
    • Patent number 5,171,097
    • Issue date Dec 15, 1992
    • Pilot Precision Kabushiki Kaisha
    • Toshimasa Nagaoka
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Swing-type mechanical pencil
    • Patent number 5,149,219
    • Issue date Sep 22, 1992
    • 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

    Rotary knock type mechanical pencil
    • Patent number 5,022,772
    • Issue date Jun 11, 1991
    • Kotobuki & Co., Ltd.
    • Hidehei 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

    Propelling pencil with cushion sleeve
    • Patent number 5,009,533
    • Issue date Apr 23, 1991
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil having an automatic lead extending mechanism
    • Patent number 4,979,839
    • Issue date Dec 25, 1990
    • Ancos Co., Ltd.
    • Yasuyuki Hashimoto
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Swing-type mechanical pencil
    • Patent number 4,929,107
    • Issue date May 29, 1990
    • Kotobuki & Co., Ltd.
    • Shuhei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Rotary knock type mechanical pencil
    • Patent number 4,895,467
    • Issue date Jan 23, 1990
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Push-type writing instrument
    • Patent number 4,844,639
    • Issue date Jul 4, 1989
    • Wen-Kwei Chao
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Push-button type mechanical pencil
    • Patent number 4,720,203
    • Issue date Jan 19, 1988
    • Iwasaki Kinzoku Kogyo Co., Ltd.
    • Shoji Shimada
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Continuous feed mechanical pencil with push button lead feed actuator
    • Patent number 4,702,634
    • Issue date Oct 27, 1987
    • Parker Pen (Benelux) B.V.
    • Gerald C. Herold
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Mechanical pencil and method for assembling the same
    • Patent number 4,687,363
    • Issue date Aug 18, 1987
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Lead delivery mechanism for mechanical pencil
    • Patent number 4,676,684
    • Issue date Jun 30, 1987
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

  • Information Patent Application

    MECHANICAL PENCIL
    • Publication number 20190375230
    • Publication date Dec 12, 2019
    • Kotobuki & Co., Ltd.
    • Hidehei Kageyama
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    MECHANICAL PENCIL
    • Publication number 20190054756
    • Publication date Feb 21, 2019
    • Kotobuki & Co., Ltd.
    • Tadao Odaka
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    WRITING UTENSIL WITH RETRACT PIECE
    • Publication number 20160375715
    • Publication date Dec 29, 2016
    • ZEBRA CO., LTD.
    • Eriko SOEJIMA
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    WRITING INSTRUMENT OR APPLICATOR HAVING RESIN MOLDED PARTS
    • Publication number 20150063893
    • Publication date Mar 5, 2015
    • MITSUBISHI PENCIL COMPANY, LIMITED
    • Kei Oomoto
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES