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Yoji Takeuchi

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  • Yokohama, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Ink composition for aqueous ballpoint pen
    • Patent number 9,416,286
    • Issue date Aug 16, 2016
    • Mitsubishi Pencil Company, Limited
    • Yoji Takeuchi
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Water-based ink composition for ball-point pen
    • Patent number 7,345,100
    • Issue date Mar 18, 2008
    • Mitsubishi Pencil Kabushiki Kaisha
    • Kiyoshi Iwamoto
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Water-based ink composition for ballpoint pen
    • Patent number 7,279,512
    • Issue date Oct 9, 2007
    • Mitsubishi Pencil Kabushiki Kaisha
    • Kiyoshi Iwamoto
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Ink follower for water-based ink ballpoint pen
    • Patent number 7,179,005
    • Issue date Feb 20, 2007
    • Mitsubishi Pencil Kabushiki Kaisha
    • Masaru Miyamoto
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Ink follower
    • Patent number 7,179,006
    • Issue date Feb 20, 2007
    • Mitsubishi Pencil Co., Ltd.
    • Masaru Miyamoto
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Water-based ink composition for writing utensil
    • Patent number 6,776,829
    • Issue date Aug 17, 2004
    • Mitsubishi Pencil Kabushiki Kaisha
    • Masaru Miyamoto
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Pseudo-plastic water based ink for ballpoint pen
    • Patent number 6,613,135
    • Issue date Sep 2, 2003
    • Mitsubishi Pencil Kabushiki Kaisha
    • Masaru Miyamoto
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Water based ink composition for writing instrument
    • Patent number 6,605,143
    • Issue date Aug 12, 2003
    • Mitsubishi Pencil Kabushiki Kaisha
    • Yoji Takeuchi
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Water-based ink composition for writing instrument
    • Patent number 6,599,352
    • Issue date Jul 29, 2003
    • Mitsubishi Pencil Kabushiki Kaisha
    • Masaru Miyamoto
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Pseudo-plastic water base ink for ball point pen
    • Patent number 6,423,127
    • Issue date Jul 23, 2002
    • Mitsubishi Kabushiki Kaisha
    • Masaru Miyamoto
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Water based ink composition for writing instrument
    • Patent number 6,264,729
    • Issue date Jul 24, 2001
    • Mitsubishi Pencil Kabushiki Kaisha
    • Masaru Miyamoto
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Water based ink for ball point pen
    • Patent number 6,261,351
    • Issue date Jul 17, 2001
    • Mitsubishi Pencil Kabushiki Kaisha
    • Masaru Miyamoto
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Pseudoplastic water based ink for ballpoint pen
    • Patent number 6,176,910
    • Issue date Jan 23, 2001
    • Mitsubishi Pencil Kabushiki Kaisha
    • Shigeru Miyazaki
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Pseudoplastic water based ink for ballpoint pen
    • Patent number 6,146,452
    • Issue date Nov 14, 2000
    • Mitsubishi Pencil Kabushiki Kaisha
    • Yoji Takeuchi
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Pseudo-plastic aqueous ink for ball point pen
    • Patent number 5,990,201
    • Issue date Nov 23, 1999
    • Mitsubishi Pencil Kabushiki Kaisha
    • Shigeru Miyazaki
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...

Patents Applicationslast 30 patents

  • Information Patent Application

    AQUEOUS INK COMPOSITION FOR WRITING INSTRUMENTS
    • Publication number 20170275484
    • Publication date Sep 28, 2017
    • MITSUBISHI PENCIL COMPANY, LIMITED
    • Chihiro NISHIJIMA
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Application

    AQUEOUS INK COMPOSITION FOR WRITING INSTRUMENTS
    • Publication number 20160264800
    • Publication date Sep 15, 2016
    • MITSUBISHI PENCIL COMPANY, LIMITED
    • Chihiro NISHIJIMA
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    AQUEOUS INK COMPOSITION FOR WRITING INSTRUMENTS
    • Publication number 20160264801
    • Publication date Sep 15, 2016
    • MITSUBISHI PENCIL COMPANY, LIMITED
    • Yoji TAKEUCHI
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    INK COMPOSITION FOR AQUEOUS BALLPOINT PEN
    • Publication number 20150275000
    • Publication date Oct 1, 2015
    • MITSUBISHI PENCIL COMPANY, LIMITED
    • Yoji Takeuchi
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Application

    Ink following element
    • Publication number 20060047017
    • Publication date Mar 2, 2006
    • Mitsubishi Pencil Co., Ltd.
    • Masaru Miyamoto
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    Ink follow-up material for water-base ball pen
    • Publication number 20050074273
    • Publication date Apr 7, 2005
    • Mitsubishi Pencil Kabushiki Kaisha
    • Masaru Miyamoto
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    Water-based ink composition for writing utensil
    • Publication number 20030196568
    • Publication date Oct 23, 2003
    • Masaru Miyamoto
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Application

    Water based ink composition for writing instrument
    • Publication number 20020007764
    • Publication date Jan 24, 2002
    • Mitsubishi Pencil Kabushiki Kaisha
    • Yoji Takeuchi
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...