TREA

Haneda Humepipe Co., Ltd.

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    KEY HOLE INSERTION FOR MANHOLE AND MANHOLE COVER LOCKING APPARATUS...
    • Patent number 6,435,763
    • Issue date Aug 20, 2002
    • Haneda Humepipe Co., Ltd.
    • Tetsushi Sakane
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Solar battery system
    • Patent number 6,346,670
    • Issue date Feb 12, 2002
    • Haneda Humepipe Co., Ltd.
    • Takashi Fujii
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Process for producing a concrete product
    • Patent number 6,126,875
    • Issue date Oct 3, 2000
    • Denki Kagaku Kogyo Kabushiki Kaisha
    • Yoshiharu Watanabe
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Method of producing lined Hume pipe
    • Patent number 4,864,711
    • Issue date Sep 12, 1989
    • Mitsubishi Plastics Industries Limited
    • Sueo Yokota
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL