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Friedhelm Kuhn

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  • Muhlheim/Ruhr, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method for the heat treatment of workpieces
    • Patent number 4,612,065
    • Issue date Sep 16, 1986
    • Ruhrgas Aktiengesellschaft
    • Friedhelm Kuhn
    • C21 - METALLURGY OF IRON
  • Information Patent Grant

    Hardening metal parts
    • Patent number 4,596,610
    • Issue date Jun 24, 1986
    • Ruhrgas Aktiengesellschaft
    • Friedhelm Kuhn
    • C21 - METALLURGY OF IRON