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Shinji Tsujio

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  • Sakai-shi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Plastic eraser, plastic eraser composite body, and method for produ...
    • Patent number 9,079,450
    • Issue date Jul 14, 2015
    • Sakura Color Products Corporation
    • Shinji Tsujio
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Erasable ink and water-base ballpoint pen using same
    • Patent number 6,706,782
    • Issue date Mar 16, 2004
    • Sakura Color Products Corporation
    • Shinji Tsujio
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Erasable ink composition
    • Patent number 6,458,192
    • Issue date Oct 1, 2002
    • Sakura Color Products Corporation
    • Shinji Tsujio
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Erasable ink and water-base ballpoint pen using same
    • Patent number 6,306,930
    • Issue date Oct 23, 2001
    • Sakura Color Products Corporation
    • Shinji Tsujio
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Crayon
    • Patent number 6,203,910
    • Issue date Mar 20, 2001
    • Sakura Color Products Corporation
    • Hidetoshi Fukuo
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Fluorescent crayon
    • Patent number 6,074,465
    • Issue date Jun 13, 2000
    • Sakura Color Products Corporation
    • Hidetoshi Fukuo
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Method for manufacturing pencil leads
    • Patent number 4,209,332
    • Issue date Jun 24, 1980
    • Sakura Color Products Corp.
    • Shinji Tsujio
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...

Patents Applicationslast 30 patents

  • Information Patent Application

    ERASER
    • Publication number 20200369869
    • Publication date Nov 26, 2020
    • SAKURA COLOR PRODUCTS CORPORATION
    • Shinji TSUJIO
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    PLASTIC ERASER, PLASTIC ERASER COMPOSITE BODY, AND METHOD FOR PRODU...
    • Publication number 20140082885
    • Publication date Mar 27, 2014
    • SAKURA COLOR PRODUCTS CORPORATION
    • Shinji Tsujio
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    Erasable ink and water-base ballpoint pen using same
    • Publication number 20010036980
    • Publication date Nov 1, 2001
    • SAKURA COLOR PRODUCTS CORPORATION
    • Shinji Tsujio
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...