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