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Electrical audio signal processing systems and devices
Circuitry combined with specific type microphone or loudspeaker
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Transducer mounting assembly
Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker – With electrostatic microphone
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Two-wire interface for digital microphones
Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker
Reexamination Certificate
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