TREA

Warren J. Johnson

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  • Hudson, WI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Raised retroreflective pavement marker
    • Patent number 6,126,360
    • Issue date Oct 3, 2000
    • 3M Innovative Properties Company
    • David C. May
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • Information Patent Grant

    Pavement marking tape
    • Patent number 5,981,033
    • Issue date Nov 9, 1999
    • 3M Innovative Properties Company
    • Dale H. Haunschild
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES