TREA

Donald F. Parsons

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  • West Chester, PA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Emergency alert system
    • Patent number 5,029,290
    • Issue date Jul 2, 1991
    • Communications Test Design, Inc.
    • Donald F. Parsons
    • G08 - SIGNALLING
  • Information Patent Grant

    Switch testing
    • Patent number 4,692,939
    • Issue date Sep 8, 1987
    • Communications Test Design, Inc.
    • Donald F. Parsons
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Circuit testing of telephone grids or the like
    • Patent number 4,670,897
    • Issue date Jun 2, 1987
    • Communications Test Design, Inc.
    • Donald F. Parsons
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Circuit testing of telephone grids or the like
    • Patent number 4,540,857
    • Issue date Sep 10, 1985
    • Communications Test Design, Inc.
    • Donald F. Parsons
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE