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HIROFUMI OKUDA

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Patents Grantslast 30 patents

  • Information Patent Grant

    Electrically conductive roll
    • Patent number 7,348,058
    • Issue date Mar 25, 2008
    • Tokai Rubber Industries, Ltd.
    • Hiroshige Hiramatsu
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Information Patent Grant

    Semi-conductive roll
    • Patent number 7,288,058
    • Issue date Oct 30, 2007
    • Tokai Rubber Industries, Ltd.
    • Akihiko Kaji
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Information Patent Grant

    Charging roll whose outermost layer contains grafted carbon
    • Patent number 6,454,688
    • Issue date Sep 24, 2002
    • Tokai Rubber Industries, Ltd.
    • Hirofumi Okuda
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Patents Applicationslast 30 patents

  • Information Patent Application

    Method for producing sheet transport roll, urethane composition use...
    • Publication number 20050202209
    • Publication date Sep 15, 2005
    • TOKAI RUBBER INDUSTRIES, LTD.
    • Hirofumi Okuda
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Application

    Electrically conductive roll
    • Publication number 20040180207
    • Publication date Sep 16, 2004
    • TOKAI RUBBER INDUSTRIES, LTD.
    • Hiroshige Hiramatsu
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Application

    Semi-conductive roll
    • Publication number 20040152575
    • Publication date Aug 5, 2004
    • TOKAI RUBBER INDUSTRIES, LTD.
    • Akihiko Kaji
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Application

    CHARGING ROLL WHOSE OUTERMOST LAYER CONTAINS GRAFTED CARBON
    • Publication number 20020086781
    • Publication date Jul 4, 2002
    • HIROFUMI OKUDA
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC