TREA

Stephen Marchetti

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  • Norwell, MA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Contrast smoke detector
    • Patent number 4,614,968
    • Issue date Sep 30, 1986
    • American District Telegraph Company
    • William J. Rattman
    • G08 - SIGNALLING
  • Information Patent Grant

    Coded security switch
    • Patent number 4,396,910
    • Issue date Aug 2, 1983
    • American District Telegraph Company
    • Robert B. Enemark
    • G08 - SIGNALLING
  • Information Patent Grant

    Electronic sounder
    • Patent number 4,303,908
    • Issue date Dec 1, 1981
    • American District Telegraph Company
    • Robert B. Enemark
    • G08 - SIGNALLING