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  • CPC
  • H04M3/4876
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HELECTRICITY H04Electric communication H04MTELEPHONIC COMMUNICATION H04M3/00Automatic or semi-automatic exchanges

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H04M3/4876Time announcements
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Device useful as a master/slave clock for transmitting standard tim...
    • Patent number 6,091,804
    • Issue date Jul 18, 2000
    • Council of Scienntific & Industrial Research
    • Parameswar Banerjee
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Grant

    Apparatus for controlling communication connections based on local...
    • Patent number 5,818,920
    • Issue date Oct 6, 1998
    • Telefonaktiebolaget LM Ericsson
    • M.ang.rten Rignell
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Location specific messaging in a telecommunications network
    • Patent number 5,539,809
    • Issue date Jul 23, 1996
    • AT&T Corp.
    • Daniel J. Mayer
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Speech synthesized time announcement circuit
    • Patent number 4,547,630
    • Issue date Oct 15, 1985
    • GTE Automatic Electric Incorporated
    • David P. Giammarrusco
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3876840
    • Patent number 3,876,840
    • Issue date Apr 8, 1975
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3632880
    • Patent number 3,632,880
    • Issue date Jan 4, 1972
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3024319
    • Patent number 3,024,319
    • Issue date Mar 6, 1962
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    2905769
    • Patent number 2,905,769
    • Issue date Sep 22, 1959
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2776341
    • Patent number 2,776,341
    • Issue date Jan 1, 1957
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2530076
    • Patent number 2,530,076
    • Issue date Nov 14, 1950
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2488840
    • Patent number 2,488,840
    • Issue date Nov 22, 1949
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2413825
    • Patent number 2,413,825
    • Issue date Jan 7, 1947
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2384634
    • Patent number 2,384,634
    • Issue date Sep 11, 1945
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2364147
    • Patent number 2,364,147
    • Issue date Dec 5, 1944
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2248081
    • Patent number 2,248,081
    • Issue date Jul 8, 1941
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2191612
    • Patent number 2,191,612
    • Issue date Feb 27, 1940
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2161945
    • Patent number 2,161,945
    • Issue date Jun 13, 1939
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2138147
    • Patent number 2,138,147
    • Issue date Nov 29, 1938
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2119212
    • Patent number 2,119,212
    • Issue date May 31, 1938
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2078312
    • Patent number 2,078,312
    • Issue date Apr 27, 1937
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2070878
    • Patent number 2,070,878
    • Issue date Feb 16, 1937
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2063385
    • Patent number 2,063,385
    • Issue date Dec 8, 1936
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2028289
    • Patent number 2,028,289
    • Issue date Jan 21, 1936
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2011216
    • Patent number 2,011,216
    • Issue date Aug 13, 1935
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2005357
    • Patent number 2,005,357
    • Issue date Jun 18, 1935
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2004248
    • Patent number 2,004,248
    • Issue date Jun 11, 1935
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1991524
    • Patent number 1,991,524
    • Issue date Feb 19, 1935
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1977860
    • Patent number 1,977,860
    • Issue date Oct 23, 1934
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1967778
    • Patent number 1,967,778
    • Issue date Jul 24, 1934
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1936700
    • Patent number 1,936,700
    • Issue date Nov 28, 1933
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents