TREA

David H. Roper

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  • Santa Monica, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Pop-up traffic control device
    • Patent number 5,425,595
    • Issue date Jun 20, 1995
    • David H. Roper
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • Information Patent Grant

    Traffic control device
    • Patent number 3,963,363
    • Issue date Jun 15, 1976
    • David H. Roper
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES