TREA

David E. Cowan

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  • Orange Village, OH, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Portable sign assembly
    • Patent number 6,769,207
    • Issue date Aug 3, 2004
    • Plastic Safety Systems, Inc.
    • Gregory H. Brown
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • 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

    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

Patents Applicationslast 30 patents

  • Information Patent Application

    PORTABLE ROADWAY WARNING DEVICE
    • Publication number 20140190395
    • Publication date Jul 10, 2014
    • Plastic Safety Systems, Inc.
    • David E. Cowan
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES