TREA

John H. Walgren

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

  • Information Patent Grant

    Cutting chain
    • Patent number 6,832,443
    • Issue date Dec 21, 2004
    • The Charles Machine Works, Inc.
    • Martin Roy Piel
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Cutting tooth for a trencher chain
    • Patent number 6,684,538
    • Issue date Feb 3, 2004
    • Vermeer Manufacturing Company
    • Larry James Rumer
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Cutting tooth for a trencher chain
    • Patent number 6,154,987
    • Issue date Dec 5, 2000
    • Vermeer Manufacturing Company
    • Larry James Rumer
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • 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

Patents Applicationslast 30 patents

  • Information Patent Application

    Cutting tooth for a trencher chain
    • Publication number 20020092209
    • Publication date Jul 18, 2002
    • Larry James Rumer
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING