TREA

Toshimasa Iio

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  • Niihama, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method of recovering gold from anode slimes
    • Patent number 4,389,248
    • Issue date Jun 21, 1983
    • Sumitomo Metal Mining Company Limited
    • Toshimasa Iio
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Method of concentrating silver from anode slime
    • Patent number 4,374,098
    • Issue date Feb 15, 1983
    • Sumitomo Metal Mining Co., Ltd.
    • Toshimasa Iio
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...