TREA

David A. Cowan

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  • Cleveland Hts., OH, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Barriers with kiss-offs
    • Patent number 7,922,420
    • Issue date Apr 12, 2011
    • Off the Wall Products, LLC
    • Marc E. Christensen
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • Information Patent Grant

    Barriers with interlocking sides
    • Patent number 7,588,387
    • Issue date Sep 15, 2009
    • Off the Wall Products, LLC
    • Marc E. Christensen
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • Information Patent Grant

    Barrier with interlocking sides
    • Patent number D533281
    • Issue date Dec 5, 2006
    • Off the Wall Products, LLC
    • Marc E. Christensen
    • D25 - Building units and construction elements
  • Information Patent Grant

    Traffic channeling device
    • Patent number 6,182,600
    • Issue date Feb 6, 2001
    • Plastic Safety Systems, Inc.
    • Gregory H. Brown
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • Information Patent Grant

    Traffic channelizer
    • Patent number D406543
    • Issue date Mar 9, 1999
    • Plastic Safety Systems, Inc.
    • Gregory H. Brown
    • D10 - Measuring, testing, or signalling instruments
  • Information Patent Grant

    Plastic fencing with reflective tape
    • Patent number 5,865,427
    • Issue date Feb 2, 1999
    • Plastic Safety Systems, Inc.
    • David A. Cowan
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • Information Patent Grant

    Tread ballast or weight for temporary traffic control devices and p...
    • Patent number 5,421,668
    • Issue date Jun 6, 1995
    • Plastic Safety Systems, Inc.
    • David E. Cowan
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • Information Patent Grant

    Traffic channeling devices
    • Patent number 5,234,280
    • Issue date Aug 10, 1993
    • Plastic Safety Systems, Inc.
    • David A. Cowan
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES

Patents Applicationslast 30 patents

  • Information Patent Application

    BARRIERS WITH KISS-OFFS
    • Publication number 20100034584
    • Publication date Feb 11, 2010
    • Off the Wall Products LLC
    • Marc E. Christensen
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES