TREA

Koichi Tsuzuki

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  • Tsuchiura, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Water purification apparatus
    • Patent number 6,251,264
    • Issue date Jun 26, 2001
    • Hitachi, Ltd.
    • Tetsuya Tanaka
    • C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • Information Patent Grant

    Purification apparatus
    • Patent number 6,139,745
    • Issue date Oct 31, 2000
    • Hitachi, Ltd.
    • Takashi Mizumori
    • C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • Information Patent Grant

    Fluidized bed filtering apparatus
    • Patent number 6,039,866
    • Issue date Mar 21, 2000
    • Hitachi, Ltd.
    • Tetsuya Tanaka
    • C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • Information Patent Grant

    Liquid purification apparatus
    • Patent number 5,944,986
    • Issue date Aug 31, 1999
    • Hitachi, Ltd.
    • Norihide Saho
    • C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • Information Patent Grant

    Purifying method and purification system for lakes and marshes
    • Patent number 5,893,978
    • Issue date Apr 13, 1999
    • Hitachi, Ltd.
    • Hiroaki Yoda
    • C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • Information Patent Grant

    Chemical analyzer non-invasive stirrer
    • Patent number 5,736,100
    • Issue date Apr 7, 1998
    • Hitachi, Ltd.
    • Ryo Miyake
    • B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL