TREA

Craig B. Walgren

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  • Lake Havasu City, AZ, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Chain for trencher apparatus
    • Patent number 6,014,826
    • Issue date Jan 18, 2000
    • Craig B. Walgren
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Chain for trencher apparatus
    • Patent number 5,248,188
    • Issue date Sep 28, 1993
    • Craig B. Walgren
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING