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Takeshi Omatsu

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Patents Grantslast 30 patents

  • Information Patent Grant

    Water base dual color ink composition and writing utensil using the...
    • Patent number 8,123,845
    • Issue date Feb 28, 2012
    • Sakura Color Products Corporation
    • Takeshi Omatsu
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Water-based ink composition
    • Patent number 8,080,098
    • Issue date Dec 20, 2011
    • Sakura Color Products Corporation
    • Norimasa Kurihara
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Tip unit for liquid applicator, method for producing the same, and...
    • Patent number 7,914,222
    • Issue date Mar 29, 2011
    • Sakura Color Products Corporation
    • Hiroshi Inoue
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Ink backflow preventive for water-based ball-point pens
    • Patent number 7,905,671
    • Issue date Mar 15, 2011
    • Sakura Color Products Corporation
    • Takeshi Omatsu
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Oil-based ink composition for writing instruments
    • Patent number 7,776,941
    • Issue date Aug 17, 2010
    • Sakura Color Products Corporation
    • Shigeki Yoneda
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Method of producing applicator tip
    • Patent number 7,721,402
    • Issue date May 25, 2010
    • Sakura Color Products Corporation
    • Hiroshi Inoue
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Coating tool
    • Patent number 7,637,680
    • Issue date Dec 29, 2009
    • Sakura Color Products Corporation
    • Shigeki Yoneda
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Water base pigment ink composition for inner lead type writing inst...
    • Patent number 7,541,394
    • Issue date Jun 2, 2009
    • Sakura Color Products Corporation
    • Kazuhiro Kawauchi
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Aqueous ink composition
    • Patent number 7,538,148
    • Issue date May 26, 2009
    • Sakura Color Products Corporation
    • Hiroshi Inoue
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Plasma sterilization indicator
    • Patent number 6,659,036
    • Issue date Dec 9, 2003
    • Sakura Color Products Corporation
    • Takeshi Omatsu
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Oily ink for writing instrument
    • Patent number 6,655,867
    • Issue date Dec 2, 2003
    • Sakura Color Products Corp.
    • Takeshi Omatsu
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Oily ink for writing instrument
    • Patent number 6,406,204
    • Issue date Jun 18, 2002
    • Sakura Color Products Corporation
    • Takeshi Omatsu
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Ozone indicator and ozone sensor ink
    • Patent number 6,336,964
    • Issue date Jan 8, 2002
    • Sakura Color Products Corporation
    • Takeshi Omatsu
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Ozone indicator and ozone detecting ink
    • Patent number 6,117,685
    • Issue date Sep 12, 2000
    • Sakura Color Products Corporation
    • Takeshi Omatsu
    • G01 - MEASURING TESTING

Patents Applicationslast 30 patents