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Viktor Weiss

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  • Fribourg, CH
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Patents Grantslast 30 patents

  • Information Patent Grant

    Photographic material
    • Patent number 4,471,048
    • Issue date Sep 11, 1984
    • Ciba-Geigy AG
    • Mario Fryberg
    • C07 - ORGANIC CHEMISTRY
  • Information Patent Grant

    Photographic material
    • Patent number 4,436,811
    • Issue date Mar 13, 1984
    • Ciba-Geigy AG
    • Mario Fryberg
    • C07 - ORGANIC CHEMISTRY