TREA

Ringing or otherwise calling substations

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Industry

  • CPC
  • H04M5/12
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Parent Industries

HELECTRICITY H04Electric communication H04MTELEPHONIC COMMUNICATION H04M5/00Manual exchanges

Current Industry

H04M5/12Ringing or otherwise calling substations
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    System and method for enabling VPN-less session setup for connectin...
    • Patent number 10,034,220
    • Issue date Jul 24, 2018
    • Tango Networks, Inc.
    • Andrew Silver
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    System and method for enabling VPN-less session setup for connectin...
    • Patent number 9,763,164
    • Issue date Sep 12, 2017
    • Tango Networks, Inc.
    • Andrew Silver
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Hybrid location
    • Patent number 9,628,521
    • Issue date Apr 18, 2017
    • TeleCommunication Systems, Inc.
    • Yinjun Zhu
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    System and method for enabling VPN-less session setup for connectin...
    • Patent number 8,537,770
    • Issue date Sep 17, 2013
    • Tango Networks, Inc.
    • Andrew Silver
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    System and method for enabling VPN-less session setup for connectin...
    • Patent number 8,175,053
    • Issue date May 8, 2012
    • Tango Networks, Inc.
    • Andrew Silver
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Method and apparatus for extending calls to internal switch extensi...
    • Patent number 6,751,309
    • Issue date Jun 15, 2004
    • Avaya Technology Corp.
    • Stephen M. Milton
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2393354
    • Patent number 2,393,354
    • Issue date Jan 22, 1946
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2356031
    • Patent number 2,356,031
    • Issue date Aug 15, 1944
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2324659
    • Patent number 2,324,659
    • Issue date Jul 20, 1943
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2249103
    • Patent number 2,249,103
    • Issue date Jul 15, 1941
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1844027
    • Patent number 1,844,027
    • Issue date Feb 9, 1932
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1721607
    • Patent number 1,721,607
    • Issue date Jul 23, 1929
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1682100
    • Patent number 1,682,100
    • Issue date Aug 28, 1928
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1673661
    • Patent number 1,673,661
    • Issue date Jun 12, 1928
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1615935
    • Patent number 1,615,935
    • Issue date Feb 1, 1927
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1615941
    • Patent number 1,615,941
    • Issue date Feb 1, 1927
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1542847
    • Patent number 1,542,847
    • Issue date Jun 23, 1925
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1466856
    • Patent number 1,466,856
    • Issue date Sep 4, 1923
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1457338
    • Patent number 1,457,338
    • Issue date Jun 5, 1923
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1440365
    • Patent number 1,440,365
    • Issue date Jan 2, 1923
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1371749
    • Patent number 1,371,749
    • Issue date Mar 15, 1921
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1333758
    • Patent number 1,333,758
    • Issue date Mar 16, 1920
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents