TREA

Hiroo Hiroyama

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  • Hitachi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Bearing apparatus
    • Patent number RE35718
    • Issue date Jan 27, 1998
    • Hitachi, Ltd.
    • Katsutoshi Nii
    • 384 - Bearings
  • Information Patent Grant

    Sealed magnetic fluid bearing for polygon mirror drive motor
    • Patent number 5,493,161
    • Issue date Feb 20, 1996
    • Hitachi, Ltd.
    • Satosi Uno
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Sealed magnetic fluid bearing for polygon mirror drive motor
    • Patent number 5,325,006
    • Issue date Jun 28, 1994
    • Hitachi, Ltd.
    • Satosi Uno
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Bearing apparatus
    • Patent number 4,938,611
    • Issue date Jul 3, 1990
    • Hitachi, Ltd.
    • Katsutoshi Nii
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...