TREA

Michael C. J. Cowpland

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  • Ottawa, CA
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Patents Grantslast 30 patents

  • 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

    Partyline subscriber interface circuit
    • Patent number 4,219,700
    • Issue date Aug 26, 1980
    • Mitel Corporation
    • Guido Panizzon
    • 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
  • Information Patent Grant

    Tone generator
    • Patent number 4,000,379
    • Issue date Dec 28, 1976
    • Mitel Canada Limited
    • Michael C. J. Cowpland
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Alternating current regulator for use with telephone type line
    • Patent number 3,989,902
    • Issue date Nov 2, 1976
    • Mitel Canada Limited
    • Michael C. J. Cowpland
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE