TREA

Ryuhei Ishikawa

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  • Tokyo, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Dynamic pressure bearing assembly
    • Patent number 5,372,432
    • Issue date Dec 13, 1994
    • Nippon Ferrofluidics Corporation
    • Ryuhei Ishikawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Sealing member for ferrofluid seal and method of producing the same
    • Patent number 5,052,697
    • Issue date Oct 1, 1991
    • Nippon Ferrofluidics Corporation
    • Ryuhei Ishikawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Sealing member for ferrofluid seal
    • Patent number 5,050,891
    • Issue date Sep 24, 1991
    • Nippon Ferrofluidice Corporation
    • Ryuhei Ishikawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...