TREA

Hiromi Sonta

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  • Akita, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method of treating H.sub.2 S containing gases
    • Patent number 4,931,262
    • Issue date Jun 5, 1990
    • Dowa Mining Co., Ltd.
    • Hiromi Sonta
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...