TREA

Arrangements for indicating calls or supervising connections for calling or clearing

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  • CPC
  • H04M5/04
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Parent Industries

HELECTRICITY H04Electric communication H04MTELEPHONIC COMMUNICATION H04M5/00Manual exchanges

Current Industry

H04M5/04Arrangements for indicating calls or supervising connections for calling or clearing
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Wearable terminal for displaying screen optimized for various situa...
    • Patent number 10,621,955
    • Issue date Apr 14, 2020
    • LG Electronics Inc.
    • Jeongyun Heo
    • A63 - SPORTS GAMES AMUSEMENTS
  • Information Patent Grant

    High efficiency split flow turbine for compressible fluids
    • Patent number 4,165,949
    • Issue date Aug 28, 1979
    • Groupe Europeen pour la Technique des Turbines a Vapeur G.E.T.T.
    • Gilbert Riollet
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    3707606
    • Patent number 3,707,606
    • Issue date Dec 26, 1972
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3549817
    • Patent number 3,549,817
    • Issue date Dec 22, 1970
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3532832
    • Patent number 3,532,832
    • Issue date Oct 6, 1970
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3514547
    • Patent number 3,514,547
    • Issue date May 26, 1970
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3505484
    • Patent number 3,505,484
    • Issue date Apr 7, 1970
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3489859
    • Patent number 3,489,859
    • Issue date Jan 13, 1970
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3350515
    • Patent number 3,350,515
    • Issue date Oct 31, 1967
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3007076
    • Patent number 3,007,076
    • Issue date Oct 31, 1961
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2987644
    • Patent number 2,987,644
    • Issue date Jun 6, 1961
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2911599
    • Patent number 2,911,599
    • Issue date Nov 3, 1959
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2876293
    • Patent number 2,876,293
    • Issue date Mar 3, 1959
    • G08 - SIGNALLING
  • Information Patent Grant

    2863093
    • Patent number 2,863,093
    • Issue date Dec 2, 1958
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2857547
    • Patent number 2,857,547
    • Issue date Oct 21, 1958
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2848553
    • Patent number 2,848,553
    • Issue date Aug 19, 1958
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2843789
    • Patent number 2,843,789
    • Issue date Jul 15, 1958
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2833962
    • Patent number 2,833,962
    • Issue date May 6, 1958
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2822500
    • Patent number 2,822,500
    • Issue date Feb 4, 1958
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2812469
    • Patent number 2,812,469
    • Issue date Nov 5, 1957
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2803777
    • Patent number 2,803,777
    • Issue date Aug 20, 1957
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2800603
    • Patent number 2,800,603
    • Issue date Jul 23, 1957
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2794144
    • Patent number 2,794,144
    • Issue date May 28, 1957
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2794145
    • Patent number 2,794,145
    • Issue date May 28, 1957
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2788465
    • Patent number 2,788,465
    • Issue date Apr 9, 1957
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2764638
    • Patent number 2,764,638
    • Issue date Sep 25, 1956
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2761908
    • Patent number 2,761,908
    • Issue date Sep 4, 1956
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2672522
    • Patent number 2,672,522
    • Issue date Mar 16, 1954
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2377453
    • Patent number 2,377,453
    • Issue date Jun 5, 1945
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2374357
    • Patent number 2,374,357
    • Issue date Apr 24, 1945
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents