TREA

Telegraph sounders; Apparatus for acoustic reception

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Industry

  • CPC
  • H04L15/285
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Parent Industries

HELECTRICITY H04Electric communication H04LTRANSMISSION OF DIGITAL INFORMATION H04L15/00Apparatus or local circuits for transmitting or receiving dot-and-dash codes

Current Industry

H04L15/285Telegraph sounders; Apparatus for acoustic reception
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    2291108
    • Patent number 2,291,108
    • Issue date Jul 28, 1942
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2147812
    • Patent number 2,147,812
    • Issue date Feb 21, 1939
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    2011145
    • Patent number 2,011,145
    • Issue date Aug 13, 1935
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1627030
    • Patent number 1,627,030
    • Issue date May 3, 1927
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1562947
    • Patent number 1,562,947
    • Issue date Nov 24, 1925
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1562815
    • Patent number 1,562,815
    • Issue date Nov 24, 1925
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1531543
    • Patent number 1,531,543
    • Issue date Mar 31, 1925
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1519840
    • Patent number 1,519,840
    • Issue date Dec 16, 1924
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1461568
    • Patent number 1,461,568
    • Issue date Jul 10, 1923
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1453359
    • Patent number 1,453,359
    • Issue date May 1, 1923
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1449501
    • Patent number 1,449,501
    • Issue date Mar 27, 1923
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1418000
    • Patent number 1,418,000
    • Issue date May 30, 1922
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1406428
    • Patent number 1,406,428
    • Issue date Feb 14, 1922
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1354389
    • Patent number 1,354,389
    • Issue date Sep 28, 1920
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1347176
    • Patent number 1,347,176
    • Issue date Jul 20, 1920
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1337797
    • Patent number 1,337,797
    • Issue date Apr 20, 1920
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1329905
    • Patent number 1,329,905
    • Issue date Feb 3, 1920
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1327352
    • Patent number 1,327,352
    • Issue date Jan 6, 1920
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1319773
    • Patent number 1,319,773
    • Issue date Oct 28, 1919
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1304356
    • Patent number 1,304,356
    • Issue date May 20, 1919
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1296142
    • Patent number 1,296,142
    • Issue date Mar 4, 1919
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1295646
    • Patent number 1,295,646
    • Issue date Feb 25, 1919
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1275903
    • Patent number 1,275,903
    • Issue date Aug 13, 1918
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1271514
    • Patent number 1,271,514
    • Issue date Jul 2, 1918
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1270861
    • Patent number 1,270,861
    • Issue date Jul 2, 1918
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1268890
    • Patent number 1,268,890
    • Issue date Jun 11, 1918
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1266841
    • Patent number 1,266,841
    • Issue date May 21, 1918
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1254432
    • Patent number 1,254,432
    • Issue date Jan 22, 1918
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1247940
    • Patent number 1,247,940
    • Issue date Nov 27, 1917
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    1220920
    • Patent number 1,220,920
    • Issue date Mar 27, 1917
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE