TREA

William H. Zimmerman

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  • Edelstein, IL, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Spherical mounting arrangement
    • Patent number 6,345,926
    • Issue date Feb 12, 2002
    • Caterpillar Inc.
    • Randy G. Farnam
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Energy storage ripping device
    • Patent number 6,311,784
    • Issue date Nov 6, 2001
    • Caterpillar Inc.
    • Donovan S. Clarke
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Method and apparatus for steering a dozing machine
    • Patent number 6,041,870
    • Issue date Mar 28, 2000
    • Caterpillar Inc.
    • William H. Zimmerman
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING