TREA

of variable resistance microphones

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Industry

  • CPC
  • H04R3/10
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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 H04R3/00Circuits for transducers , loudspeakers or microphones

Current Industry

H04R3/10of variable resistance microphones
Industries