TREA

Tadamasa Yamada

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  • Nagoya, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method of purifying a bearing steel
    • Patent number 4,702,767
    • Issue date Oct 27, 1987
    • Aichi Steel Works, Ltd.
    • Yatsuka Takata
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Bearing steel and method of manufacturing the same
    • Patent number 4,642,219
    • Issue date Feb 10, 1987
    • Aichi Steel Works, Ltd.
    • Yatsuka Takata
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...