TREA

for microphones

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Industry

  • CPC
  • H04R29/004
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Parent Industries

HELECTRICITY H04Electric communication H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS DEAF-AID SETS PUBLIC ADDRESS SYSTEMS H04R29/00Monitoring arrangements Testing arrangements

Current Industry

H04R29/004for microphones
Industries