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by generating or selecting other signals than trains of pulses of similar shape or other signals than currents of one or more different frequencies

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  • CPC
  • H04M1/515
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Parent Industries

HELECTRICITY H04Electric communication H04MTELEPHONIC COMMUNICATION H04M1/00Substation equipment

Current Industry

H04M1/515by generating or selecting other signals than trains of pulses of similar shape or other signals than currents of one or more different frequencies
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Method and apparatus for converting frequency signals representing...
    • Patent number 4,636,590
    • Issue date Jan 13, 1987
    • Computer Security Corporation
    • John P. Cairns
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Telephone including resistive array for dialing and system for usin...
    • Patent number 4,523,056
    • Issue date Jun 11, 1985
    • Reliance Electric Company
    • Thomas M. Fisher
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3806662
    • Patent number 3,806,662
    • Issue date Apr 23, 1974
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3786496
    • Patent number 3,786,496
    • Issue date Jan 15, 1974
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3748395
    • Patent number 3,748,395
    • Issue date Jul 24, 1973
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3721976
    • Patent number 3,721,976
    • Issue date Mar 20, 1973
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3603737
    • Patent number 3,603,737
    • Issue date Sep 7, 1971
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3546392
    • Patent number 3,546,392
    • Issue date Dec 8, 1970
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3525816
    • Patent number 3,525,816
    • Issue date Aug 25, 1970
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3515809
    • Patent number 3,515,809
    • Issue date Jun 2, 1970
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3508013
    • Patent number 3,508,013
    • Issue date Apr 21, 1970
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3489861
    • Patent number 3,489,861
    • Issue date Jan 13, 1970
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3483332
    • Patent number 3,483,332
    • Issue date Dec 9, 1969
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3471470
    • Patent number 3,471,470
    • Issue date Oct 7, 1969
    • C07 - ORGANIC CHEMISTRY
  • Information Patent Grant

    3454724
    • Patent number 3,454,724
    • Issue date Jul 8, 1969
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3355558
    • Patent number 3,355,558
    • Issue date Nov 28, 1967
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3330914
    • Patent number 3,330,914
    • Issue date Jul 11, 1967
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3296383
    • Patent number 3,296,383
    • Issue date Jan 3, 1967
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3294923
    • Patent number 3,294,923
    • Issue date Dec 27, 1966
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3293367
    • Patent number 3,293,367
    • Issue date Dec 20, 1966
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3243516
    • Patent number 3,243,516
    • Issue date Mar 29, 1966
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3183454
    • Patent number 3,183,454
    • Issue date May 11, 1965
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3061687
    • Patent number 3,061,687
    • Issue date Oct 30, 1962
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3011028
    • Patent number 3,011,028
    • Issue date Nov 28, 1961
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3004106
    • Patent number 3,004,106
    • Issue date Oct 10, 1961
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2999227
    • Patent number 2,999,227
    • Issue date Sep 5, 1961
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2960691
    • Patent number 2,960,691
    • Issue date Nov 15, 1960
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2957952
    • Patent number 2,957,952
    • Issue date Oct 25, 1960
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2953646
    • Patent number 2,953,646
    • Issue date Sep 20, 1960
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2927971
    • Patent number 2,927,971
    • Issue date Mar 8, 1960
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents