TREA

Patrick R. Beirne

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  • Stittsville, CA
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Patents Grantslast 30 patents

  • Information Patent Grant

    Digital tone detector
    • Patent number 4,694,482
    • Issue date Sep 15, 1987
    • Mitel Corporation
    • Gordon J. Reesor
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Digital tone detector
    • Patent number 4,669,114
    • Issue date May 26, 1987
    • Mitel Corporation
    • Gordon J. Reesor
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Subscriber line interface circuit
    • Patent number 4,540,854
    • Issue date Sep 10, 1985
    • Mitel Corporation
    • Patrick R. Beirne
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Subscriber line interface circuit
    • Patent number 4,472,608
    • Issue date Sep 18, 1984
    • Mitel Corporation
    • Patrick R. Beirne
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Power saving line circuit
    • Patent number 4,410,766
    • Issue date Oct 18, 1983
    • Mitel Corporation
    • Patrick R. Beirne
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Keyless and indicatorless local telephone switching system
    • Patent number 4,376,875
    • Issue date Mar 15, 1983
    • Mitel Corporation
    • Patrick R. Beirne
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Trunk circuit with single coupling transformer
    • Patent number 4,321,431
    • Issue date Mar 23, 1982
    • Mitel Corporation
    • Patrick R. Beirne
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Telephone line circuit
    • Patent number 4,281,219
    • Issue date Jul 28, 1981
    • Mitel Corporation
    • Michael C. J. Cowpland
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Tone decoding circuit
    • Patent number 4,273,965
    • Issue date Jun 16, 1981
    • Mitel Corporation
    • Michael C. J. Cowpland
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Switching matrix
    • Patent number 4,245,214
    • Issue date Jan 13, 1981
    • Mitel Corporation
    • Patrick R. Beirne
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Transformerless trunk circuit
    • Patent number 4,182,936
    • Issue date Jan 8, 1980
    • Mitel Corporation
    • Patrick R. Beirne
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Transformerless telephone line circuit
    • Patent number 4,178,485
    • Issue date Dec 11, 1979
    • Mitel Corporation of Kanata
    • Michael C. J. Cowpland
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE