TREA

Howard A. Perko

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  • Fort Collins, CO, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Helical pier with opposed external bars
    • Patent number D613881
    • Issue date Apr 13, 2010
    • Magnum Piering, Inc.
    • Howard A. Perko
    • D25 - Building units and construction elements
  • Information Patent Grant

    Helical pier
    • Patent number D612954
    • Issue date Mar 30, 2010
    • Magnum Piering, Inc.
    • Howard A. Perko
    • D25 - Building units and construction elements