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Apparatus or local circuits for step-by-step systems

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  • CPC
  • H04L19/00
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HELECTRICITY H04Electric communication H04LTRANSMISSION OF DIGITAL INFORMATION

Current Industry

H04L19/00Apparatus or local circuits for step-by-step systems
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Methods and apparatus for knowledge-based authentication using hist...
    • Patent number 9,009,844
    • Issue date Apr 14, 2015
    • EMC Corporation
    • Thomas S. Corn
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3234515
    • Patent number 3,234,515
    • Issue date Feb 8, 1966
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    3154635
    • Patent number 3,154,635
    • Issue date Oct 27, 1964
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2750445
    • Patent number 2,750,445
    • Issue date Jun 12, 1956
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2579101
    • Patent number 2,579,101
    • Issue date Dec 18, 1951
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2566831
    • Patent number 2,566,831
    • Issue date Sep 4, 1951
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2549028
    • Patent number 2,549,028
    • Issue date Apr 17, 1951
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2548720
    • Patent number 2,548,720
    • Issue date Apr 10, 1951
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2531868
    • Patent number 2,531,868
    • Issue date Nov 28, 1950
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2487118
    • Patent number 2,487,118
    • Issue date Nov 8, 1949
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2454967
    • Patent number 2,454,967
    • Issue date Nov 30, 1948
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2451859
    • Patent number 2,451,859
    • Issue date Oct 19, 1948
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2451812
    • Patent number 2,451,812
    • Issue date Oct 19, 1948
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2431314
    • Patent number 2,431,314
    • Issue date Nov 25, 1947
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2425801
    • Patent number 2,425,801
    • Issue date Aug 19, 1947
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2425307
    • Patent number 2,425,307
    • Issue date Aug 12, 1947
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2360719
    • Patent number 2,360,719
    • Issue date Oct 17, 1944
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2353673
    • Patent number 2,353,673
    • Issue date Jul 18, 1944
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2317496
    • Patent number 2,317,496
    • Issue date Apr 27, 1943
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2306745
    • Patent number 2,306,745
    • Issue date Dec 29, 1942
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2259681
    • Patent number 2,259,681
    • Issue date Oct 21, 1941
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2233668
    • Patent number 2,233,668
    • Issue date Mar 4, 1941
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2233667
    • Patent number 2,233,667
    • Issue date Mar 4, 1941
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2215802
    • Patent number 2,215,802
    • Issue date Sep 24, 1940
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2215801
    • Patent number 2,215,801
    • Issue date Sep 24, 1940
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2214642
    • Patent number 2,214,642
    • Issue date Sep 10, 1940
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2162790
    • Patent number 2,162,790
    • Issue date Jun 20, 1939
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2144176
    • Patent number 2,144,176
    • Issue date Jan 17, 1939
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2102899
    • Patent number 2,102,899
    • Issue date Dec 21, 1937
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2090203
    • Patent number 2,090,203
    • Issue date Aug 17, 1937
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents