TREA

Keiji Nakamura

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  • Funabashi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Wear resistant ferro-based sintered alloy
    • Patent number 4,526,617
    • Issue date Jul 2, 1985
    • Nippon Piston Ring Co., Ltd.
    • Takeshi Hiraoka
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Abrasion resistant ferro-based sintered alloy
    • Patent number 4,348,232
    • Issue date Sep 7, 1982
    • Nippon Piston Ring Co., Ltd.
    • Takeshi Hiraoka
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...