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Kotaro Sumitomo

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Patents Grantslast 30 patents

  • Information Patent Grant

    Crayon
    • Patent number 8,431,632
    • Issue date Apr 30, 2013
    • Sakura Color Products Corporation
    • Kotaro Sumitomo
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Crayon and process for producing the same
    • Patent number 8,299,143
    • Issue date Oct 30, 2012
    • Sakura Color Products Corporation
    • Kotaro Sumitomo
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Crayon and process for producing the same
    • Patent number 8,242,190
    • Issue date Aug 14, 2012
    • Sakura Color Products Corporation
    • Kotaro Sumitomo
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Process for production of black crayon
    • Patent number 7,943,684
    • Issue date May 17, 2011
    • Sakura Color Products Corporation
    • Kotaro Sumitomo
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Photostorage solid drawing medium
    • Patent number 7,485,406
    • Issue date Feb 3, 2009
    • Sakura Color Products Corporation
    • Hidetoshi Fukuo
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Solid drawing material and method for producing the same
    • Patent number 7,291,210
    • Issue date Nov 6, 2007
    • Sakura Color Products Corporation
    • Keiko Nakamura
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...

Patents Applicationslast 30 patents

  • Information Patent Application

    CRAYON
    • Publication number 20100273914
    • Publication date Oct 28, 2010
    • SAKURA COLOR PRODUCTS CORPORATION
    • Kotaro Sumitomo
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Application

    CRAYON AND PROCESS FOR PRODUCING THE SAME
    • Publication number 20100016471
    • Publication date Jan 21, 2010
    • SAKURA COLOR PRODUCTS CORPORATION
    • Kotaro Sumitomo
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Application

    CRAYON AND PROCESS FOR PRODUCING THE SAME
    • Publication number 20090326096
    • Publication date Dec 31, 2009
    • Sakura Color Products Corporation
    • Kotaro Sumitomo
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Application

    PROCESS FOR PRODUCTION OF BLACK CRAYON
    • Publication number 20090247668
    • Publication date Oct 1, 2009
    • Kotaro Sumitomo
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    CRAYON
    • Publication number 20090209678
    • Publication date Aug 20, 2009
    • SAKURA COLOR PRODUCTS CORPORATION
    • Kotaro Sumitomo
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    Photostorage solid drawing medium
    • Publication number 20060210924
    • Publication date Sep 21, 2006
    • Hidetoshi Fukuo
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Application

    Solid drawing material and method for producing the same
    • Publication number 20050252409
    • Publication date Nov 17, 2005
    • Keiko Nakamura
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Application

    Photostorage solid drawing medium
    • Publication number 20050197423
    • Publication date Sep 8, 2005
    • Hidetoshi Fukuo
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES