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David R. Collins

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  • Washington Crossing, PA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Window frame
    • Patent number 4,037,378
    • Issue date Jul 26, 1977
    • Replacement Products Industries Corporation
    • David R. Collins
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Window sash and frame with thermal barrier
    • Patent number 4,024,690
    • Issue date May 24, 1977
    • Replacement Products Industries Corporation
    • David R. Collins
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS