TREA

Akio Okayama

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Patents Grantslast 30 patents

  • Information Patent Grant

    Rolling bearings and gear shaft support device
    • Patent number 6,423,158
    • Issue date Jul 23, 2002
    • NTN Corporation
    • Kikuo Maeda
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Rolling bearing
    • Patent number 6,306,227
    • Issue date Oct 23, 2001
    • NTN Corporation
    • Akio Okayama
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • 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...

Patents Applicationslast 30 patents

  • Information Patent Application

    ROLLING BEARING
    • Publication number 20010015240
    • Publication date Aug 23, 2001
    • AKIO OKAYAMA
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...