TREA

Thomas S. Hammer

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  • Portland, OR, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Retaining wall block
    • Patent number D475143
    • Issue date May 27, 2003
    • Westblock Systems, Inc.
    • Thomas S. Hammer
    • D25 - Building units and construction elements
  • Information Patent Grant

    Retaining wall block
    • Patent number D468450
    • Issue date Jan 7, 2003
    • Westblock Systems, Inc.
    • Thomas S. Hammer
    • D25 - Building units and construction elements
  • Information Patent Grant

    Retaining wall block
    • Patent number D466228
    • Issue date Nov 26, 2002
    • Westblock Systems, Inc.
    • Thomas S. Hammer
    • D25 - Building units and construction elements
  • Information Patent Grant

    Retaining wall block
    • Patent number D433158
    • Issue date Oct 31, 2000
    • Westblock Systems, Inc.
    • Thomas S. Hammer
    • D25 - Building units and construction elements