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Michael Hoffman

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  • Berlin, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Seal for a drive journal of a ball valve
    • Patent number 4,103,909
    • Issue date Aug 1, 1978
    • Borsig Gesellschaft mit beschrankter Haftung
    • Michael Hoffman
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...