TREA

Calling by using continuous ac

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  • CPC
  • H04Q9/08
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Parent Industries

HELECTRICITY H04Electric communication H04QSELECTING H04Q9/00Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Current Industry

H04Q9/08Calling by using continuous ac
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Radio command device
    • Patent number 7,034,899
    • Issue date Apr 25, 2006
    • Somfy SAS
    • Lionel Symoen
    • G08 - SIGNALLING
  • Information Patent Grant

    Interrogator system for identifying electrical circuits
    • Patent number 4,737,657
    • Issue date Apr 12, 1988
    • William B. Jatko
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Switch network
    • Patent number 4,435,706
    • Issue date Mar 6, 1984
    • Allen-Bradley Company
    • John E. Callan
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Apparatus for determining the state of each of a plurality of bi-st...
    • Patent number 4,268,822
    • Issue date May 19, 1981
    • The Foxboro Company
    • Everett O. Olsen
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Multiplexed data monitoring system
    • Patent number 4,027,286
    • Issue date May 31, 1977
    • TRW Inc.
    • Ronald Jon Marosko
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3883868
    • Patent number 3,883,868
    • Issue date May 13, 1975
    • G08 - SIGNALLING
  • Information Patent Grant

    3719928
    • Patent number 3,719,928
    • Issue date Mar 6, 1973
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3654605
    • Patent number 3,654,605
    • Issue date Apr 4, 1972
    • G08 - SIGNALLING
  • Information Patent Grant

    3550090
    • Patent number 3,550,090
    • Issue date Dec 22, 1970
    • G08 - SIGNALLING
  • Information Patent Grant

    3424919
    • Patent number 3,424,919
    • Issue date Jan 28, 1969
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3164771
    • Patent number 3,164,771
    • Issue date Jan 5, 1965
    • G01 - MEASURING TESTING
  • Information Patent Grant

    2939054
    • Patent number 2,939,054
    • Issue date May 31, 1960
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2923855
    • Patent number 2,923,855
    • Issue date Feb 2, 1960
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2840797
    • Patent number 2,840,797
    • Issue date Jun 24, 1958
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2581056
    • Patent number 2,581,056
    • Issue date Jan 1, 1952
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2484573
    • Patent number 2,484,573
    • Issue date Oct 11, 1949
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2367960
    • Patent number 2,367,960
    • Issue date Jan 23, 1945
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    2348312
    • Patent number 2,348,312
    • Issue date May 9, 1944
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2346238
    • Patent number 2,346,238
    • Issue date Apr 11, 1944
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2021099
    • Patent number 2,021,099
    • Issue date Nov 12, 1935
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1897204
    • Patent number 1,897,204
    • Issue date Feb 14, 1933
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1817753
    • Patent number 1,817,753
    • Issue date Aug 4, 1931
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents