TREA

Hermann Haarkotter

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  • Krefeld, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Synthetic-resin compression spring
    • Patent number 4,660,811
    • Issue date Apr 28, 1987
    • Ringfeder G.m.b.H.
    • Dieter Muhlhahn
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...