TREA

by predetermined number of pulses

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  • CPC
  • H04Q5/16
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Parent Industries

HELECTRICITY H04Electric communication H04QSELECTING H04Q5/00Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange

Current Industry

H04Q5/16by predetermined number of pulses
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Ringing decoder circuit
    • Patent number 4,293,737
    • Issue date Oct 6, 1981
    • Mitel Corporation
    • Jacob Cepelinski
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3739100
    • Patent number 3,739,100
    • Issue date Jun 12, 1973
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3626106
    • Patent number 3,626,106
    • Issue date Dec 7, 1971
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3524931
    • Patent number 3,524,931
    • Issue date Aug 18, 1970
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3415953
    • Patent number 3,415,953
    • Issue date Dec 10, 1968
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3091666
    • Patent number 3,091,666
    • Issue date May 28, 1963
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3074051
    • Patent number 3,074,051
    • Issue date Jan 15, 1963
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2906996
    • Patent number 2,906,996
    • Issue date Sep 29, 1959
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2723313
    • Patent number 2,723,313
    • Issue date Nov 8, 1955
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2707725
    • Patent number 2,707,725
    • Issue date May 3, 1955
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2425818
    • Patent number 2,425,818
    • Issue date Aug 19, 1947
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2422565
    • Patent number 2,422,565
    • Issue date Jun 17, 1947
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2375048
    • Patent number 2,375,048
    • Issue date May 1, 1945
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2351360
    • Patent number 2,351,360
    • Issue date Jun 13, 1944
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2337486
    • Patent number 2,337,486
    • Issue date Dec 21, 1943
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2320885
    • Patent number 2,320,885
    • Issue date Jun 1, 1943
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2259960
    • Patent number 2,259,960
    • Issue date Oct 21, 1941
    • G08 - SIGNALLING
  • Information Patent Grant

    2257266
    • Patent number 2,257,266
    • Issue date Sep 30, 1941
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2250856
    • Patent number 2,250,856
    • Issue date Jul 29, 1941
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2245799
    • Patent number 2,245,799
    • Issue date Jun 17, 1941
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2221655
    • Patent number 2,221,655
    • Issue date Nov 12, 1940
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2203756
    • Patent number 2,203,756
    • Issue date Jun 11, 1940
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2180963
    • Patent number 2,180,963
    • Issue date Nov 21, 1939
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2082077
    • Patent number 2,082,077
    • Issue date Jun 1, 1937
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2077947
    • Patent number 2,077,947
    • Issue date Apr 20, 1937
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2045682
    • Patent number 2,045,682
    • Issue date Jun 30, 1936
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2029636
    • Patent number 2,029,636
    • Issue date Feb 4, 1936
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1901867
    • Patent number 1,901,867
    • Issue date Mar 21, 1933
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1712725
    • Patent number 1,712,725
    • Issue date May 14, 1929
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1691080
    • Patent number 1,691,080
    • Issue date Nov 13, 1928
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents