TREA

Andrew P. Dretzka

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  • Cudahy, WI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Bearing retainer assembly
    • Patent number 5,590,968
    • Issue date Jan 7, 1997
    • Harnischfeger Corporation
    • Andrew P. Dretzka
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Assembly and method for tooth tip retention
    • Patent number 5,410,826
    • Issue date May 2, 1995
    • Harnischfeger Corporation
    • Darryl R. Immel
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Bucket dump block
    • Patent number 5,398,433
    • Issue date Mar 21, 1995
    • Harnischfeger Corporation
    • Andrew P. Dretzka
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING