TREA

Jan Witt

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  • Eckernforde, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Means for securing a cover over a drainage channel
    • Patent number 5,468,096
    • Issue date Nov 21, 1995
    • ACO Severin Ahlmann GmbH & Co., KG
    • Heinrich Sauerwein
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Surface drainage apparatus
    • Patent number 5,437,516
    • Issue date Aug 1, 1995
    • ACO Severin Ahlmann GmbH & Co., KG
    • Heinrich Sauerwein
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING