TREA

Clarence W. Sidwell

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  • Pittsburgh, PA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Skid mark erasure system
    • Patent number 5,007,824
    • Issue date Apr 16, 1991
    • Clarence W. Sidwell
    • C21 - METALLURGY OF IRON
  • Information Patent Grant

    Skid mark erasure system
    • Patent number 4,936,771
    • Issue date Jun 26, 1990
    • Clarence W. Sidwell
    • C21 - METALLURGY OF IRON