TREA

David E. Ruch

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  • Lancaster, PA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Hybrid floor covering
    • Patent number 5,188,874
    • Issue date Feb 23, 1993
    • Armstrong World Industries, Inc.
    • William J. Kauffman
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Tension floor covering with reinforcing layer
    • Patent number 5,082,708
    • Issue date Jan 21, 1992
    • Armstrong World Industries, Inc.
    • William J. Kauffman
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Hybrid floor covering
    • Patent number 5,080,944
    • Issue date Jan 14, 1992
    • Armstrong World Industries, Inc.
    • William J. Kauffman
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL