TREA

Arrangements wherein a dial or equivalent is mechanically coupled to a line selector

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  • CPC
  • H04M1/52
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Parent Industries

HELECTRICITY H04Electric communication H04MTELEPHONIC COMMUNICATION H04M1/00Substation equipment

Current Industry

H04M1/52Arrangements wherein a dial or equivalent is mechanically coupled to a line selector
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Key telephone adapter for electronic telephone switching system
    • Patent number 4,061,887
    • Issue date Dec 6, 1977
    • Rolm Corporation
    • James M. Kasson
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3306986
    • Patent number 3,306,986
    • Issue date Feb 28, 1967
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3210481
    • Patent number 3,210,481
    • Issue date Oct 5, 1965
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2905766
    • Patent number 2,905,766
    • Issue date Sep 22, 1959
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2810016
    • Patent number 2,810,016
    • Issue date Oct 15, 1957
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2802904
    • Patent number 2,802,904
    • Issue date Aug 13, 1957
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2794861
    • Patent number 2,794,861
    • Issue date Jun 4, 1957
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2757241
    • Patent number 2,757,241
    • Issue date Jul 31, 1956
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2653192
    • Patent number 2,653,192
    • Issue date Sep 22, 1953
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2622154
    • Patent number 2,622,154
    • Issue date Dec 16, 1952
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2572503
    • Patent number 2,572,503
    • Issue date Oct 23, 1951
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2536829
    • Patent number 2,536,829
    • Issue date Jan 2, 1951
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2465397
    • Patent number 2,465,397
    • Issue date Mar 29, 1949
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2387719
    • Patent number 2,387,719
    • Issue date Oct 30, 1945
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2370264
    • Patent number 2,370,264
    • Issue date Feb 27, 1945
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2223927
    • Patent number 2,223,927
    • Issue date Dec 3, 1940
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2223926
    • Patent number 2,223,926
    • Issue date Dec 3, 1940
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2199686
    • Patent number 2,199,686
    • Issue date May 7, 1940
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1992389
    • Patent number 1,992,389
    • Issue date Feb 26, 1935
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1976729
    • Patent number 1,976,729
    • Issue date Oct 16, 1934
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1956360
    • Patent number 1,956,360
    • Issue date Apr 24, 1934
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1898305
    • Patent number 1,898,305
    • Issue date Feb 21, 1933
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1894828
    • Patent number 1,894,828
    • Issue date Jan 17, 1933
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1783936
    • Patent number 1,783,936
    • Issue date Dec 2, 1930
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1738624
    • Patent number 1,738,624
    • Issue date Dec 10, 1929
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1479586
    • Patent number 1,479,586
    • Issue date Jan 1, 1924
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1471696
    • Patent number 1,471,696
    • Issue date Oct 23, 1923
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1383355
    • Patent number 1,383,355
    • Issue date Jul 5, 1921
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1081712
    • Patent number 1,081,712
    • Issue date Dec 16, 1913
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    995528
    • Patent number 995,528
    • Issue date Jun 20, 1911
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE