TREA

Alfred Magnus Hestad

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  • Chicago, IL, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Telephone call routing and charging system
    • Patent number 4,410,765
    • Issue date Oct 18, 1983
    • United Networks, Inc.
    • Alfred M. Hestad
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Speaker phones
    • Patent number 4,346,261
    • Issue date Aug 24, 1982
    • United Networks, Inc.
    • Alfred M. Hestad
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Subscriber station networks
    • Patent number 4,314,107
    • Issue date Feb 2, 1982
    • United Networks, Inc.
    • Alfred M. Hestad
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Two-way amplifier arrangement
    • Patent number 4,278,843
    • Issue date Jul 14, 1981
    • Anaconda-Ericsson Inc.
    • Alfred M. Hestad
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Dialing system
    • Patent number 4,232,200
    • Issue date Nov 4, 1980
    • United Networks, Inc.
    • Alfred M. Hestad
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Push button to rotary dial converter systems
    • Patent number 4,167,655
    • Issue date Sep 11, 1979
    • United Networks Inc.
    • Alfred M. Hestad
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Telephone switching system
    • Patent number 4,087,645
    • Issue date May 2, 1978
    • Alfred Magnus Hestad
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE