TREA

Hirokazu Nakajima

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  • Kaizu, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Grease-sealed bearing with oxide layers
    • Patent number 5,150,974
    • Issue date Sep 29, 1992
    • NTN Corporation
    • Kenji Tamada
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Bearing race member and method of fabrication
    • Patent number 4,992,111
    • Issue date Feb 12, 1991
    • NTN Corporation
    • Hiroshi Yamada
    • C21 - METALLURGY OF IRON
  • Information Patent Grant

    Rolling bearing
    • Patent number 4,696,581
    • Issue date Sep 29, 1987
    • NTN Toyo Bearing Co., Ltd.
    • Noriyuki Tsushima
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...