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  • H04M5/02
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HELECTRICITY H04Electric communication H04MTELEPHONIC COMMUNICATION H04M5/00Manual exchanges

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H04M5/02Constructional details
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Patents Grantslast 30 patents

  • Information Patent Grant

    Portable voice communications digital switching device for communic...
    • Patent number 9,819,804
    • Issue date Nov 14, 2017
    • TELEGENIX, INC.
    • Joseph John Miller
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Supports for telephone jacks and circuit boards incorporating such...
    • Patent number 4,423,466
    • Issue date Dec 27, 1983
    • Northern Telecom Limited
    • Roger Beun
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Telephone answering service console
    • Patent number 4,022,984
    • Issue date May 10, 1977
    • Steven M. Gray
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3911229
    • Patent number 3,911,229
    • Issue date Oct 7, 1975
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3046356
    • Patent number 3,046,356
    • Issue date Jul 24, 1962
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3045080
    • Patent number 3,045,080
    • Issue date Jul 17, 1962
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3015700
    • Patent number 3,015,700
    • Issue date Jan 2, 1962
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2712916
    • Patent number 2,712,916
    • Issue date Jul 12, 1955
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2664665
    • Patent number 2,664,665
    • Issue date Jan 5, 1954
    • A63 - SPORTS GAMES AMUSEMENTS
  • Information Patent Grant

    2459237
    • Patent number 2,459,237
    • Issue date Jan 18, 1949
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2450008
    • Patent number 2,450,008
    • Issue date Sep 28, 1948
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    2447753
    • Patent number 2,447,753
    • Issue date Aug 24, 1948
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2438515
    • Patent number 2,438,515
    • Issue date Mar 30, 1948
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2355195
    • Patent number 2,355,195
    • Issue date Aug 8, 1944
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2301189
    • Patent number 2,301,189
    • Issue date Nov 10, 1942
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2296759
    • Patent number 2,296,759
    • Issue date Sep 22, 1942
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2261822
    • Patent number 2,261,822
    • Issue date Nov 4, 1941
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2241882
    • Patent number 2,241,882
    • Issue date May 13, 1941
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
  • Information Patent Grant

    2226725
    • Patent number 2,226,725
    • Issue date Dec 31, 1940
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2194933
    • Patent number 2,194,933
    • Issue date Mar 26, 1940
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2016475
    • Patent number 2,016,475
    • Issue date Oct 8, 1935
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1999497
    • Patent number 1,999,497
    • Issue date Apr 30, 1935
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1931618
    • Patent number 1,931,618
    • Issue date Oct 24, 1933
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1930275
    • Patent number 1,930,275
    • Issue date Oct 10, 1933
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1927514
    • Patent number 1,927,514
    • Issue date Sep 19, 1933
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1894824
    • Patent number 1,894,824
    • Issue date Jan 17, 1933
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1855602
    • Patent number 1,855,602
    • Issue date Apr 26, 1932
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1842610
    • Patent number 1,842,610
    • Issue date Jan 26, 1932
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1828455
    • Patent number 1,828,455
    • Issue date Oct 20, 1931
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1817738
    • Patent number 1,817,738
    • Issue date Aug 4, 1931
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents