TREA

Hirokazu Takii

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  • Osaka, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Ferrofluid seal apparatus
    • Patent number 5,238,254
    • Issue date Aug 24, 1993
    • Koyo Seiko Co., Ltd.
    • Hirokazu Takii
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Ferrofluid seal apparatus
    • Patent number 5,152,539
    • Issue date Oct 6, 1992
    • Koyo Seiko Co., Ltd.
    • Hirokazu Takii
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Ball bearing for use in vacuum and turbo-molecular pump incorporati...
    • Patent number 5,139,396
    • Issue date Aug 18, 1992
    • Koyo Seiko Co., Ltd.
    • Kazuya Suzuki
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...