TREA

Norman P. Proehl

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  • Lake Forest, IL, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method of dredging with a pivotally mounted cutter head
    • Patent number 4,593,484
    • Issue date Jun 10, 1986
    • Norman P. Proehl
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Dredge swinging apparatus
    • Patent number 4,470,209
    • Issue date Sep 11, 1984
    • Norman P. Proehl
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Dredge cutter head
    • Patent number 4,050,170
    • Issue date Sep 27, 1977
    • Proehl; Norman P.
    • Norman P. Proehl
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING