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Fredrik W. de Groot

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  • Zeven, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Mechanical shock absorber
    • Patent number 4,396,096
    • Issue date Aug 2, 1983
    • LISEGA Kraftwerkstechnik GmbH & Co. KG
    • Fredrik W. de Groot
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Mechanical shock absorber
    • Patent number 4,275,802
    • Issue date Jun 30, 1981
    • Lisega Kraftwerkstecknik GmbH & Co. KG
    • Fredrik W. de Groot
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...