TREA

Kengo Hasegawa

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  • Sakura, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method of manufacturing an impeller
    • Patent number 5,697,152
    • Issue date Dec 16, 1997
    • Hitachi, Ltd.
    • Susumu Yamazaki
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vortex blower
    • Patent number 5,569,023
    • Issue date Oct 29, 1996
    • Hitachi, Ltd.
    • Fumiaki Ishida
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vortex flow blower having blades each formed by curved surface
    • Patent number 5,536,139
    • Issue date Jul 16, 1996
    • Hitachi, Ltd.
    • Susumu Yamazaki
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vortex flow blower having blades each formed by curved surface and...
    • Patent number 5,395,210
    • Issue date Mar 7, 1995
    • Hitachi, Ltd.
    • Susumu Yamazaki
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Vortex blower
    • Patent number D327316
    • Issue date Jun 23, 1992
    • Hitachi, Ltd.
    • Toshiharu Yoshidomi
    • D23 - Environmental heating and cooling
  • Information Patent Grant

    Inverter device
    • Patent number 5,091,823
    • Issue date Feb 25, 1992
    • Hitachi, Ltd.
    • Takatsugu Kanbara
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Submersible thrust bearing apparatus
    • Patent number 5,035,519
    • Issue date Jul 30, 1991
    • Hitachi, Ltd.
    • Kooji Aizawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Heating and cooling ventilating system with heat recovery
    • Patent number 4,333,520
    • Issue date Jun 8, 1982
    • Hitachi, Ltd.
    • Michio Yanadori
    • F24 - HEATING RANGES VENTILATING