TREA

Friedrich Schittek

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  • Bremen, DT
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Patents Grantslast 30 patents

  • Information Patent Grant

    Flap valve
    • Patent number 4,019,532
    • Issue date Apr 26, 1977
    • Gustav F. Gerdts KG
    • Friedrich Schittek
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Flap valve
    • Patent number 3,990,471
    • Issue date Nov 9, 1976
    • Gustav F. Gerdts KG
    • Gerhard Schutzer
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...