4. Electrical audio signal processing systems and devices
  5. Circuitry combined with specific type microphone or loudspeaker
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Ear microphone

Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker – With piezoelectric microphone
Patent

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Electret condensor microphone preamplifier that is...

Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker – With electrostatic microphone
Reexamination Certificate

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Electret microphone circuit with low battery disable

Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker – With electrostatic microphone
Reexamination Certificate

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Electret-condenser microphone

Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker – With electrostatic microphone
Reexamination Certificate

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Electret-condenser microphone

Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker – With electrostatic microphone
Reexamination Certificate

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Electroacoustic transducer and a method for manufacturing thereo

Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker – With electrostatic microphone
Patent

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Electroacoustic transducer of digital type

Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker
Patent

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Electroacoustic transducer system

Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker – With electrostatic microphone
Patent

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Electroacoustic transducer with piezoelectric diaphragm

Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker – With piezoelectric microphone
Patent

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Electronic device accessory

Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker – With electrostatic microphone
Reexamination Certificate

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Electronic driving circuit for directing an audio signal...

Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker
Reexamination Certificate

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Electrostatic transducer unit

Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker – With electrostatic loudspeaker
Patent

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Electrostatic transducer, driving circuit of capacitive...

Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker – With electrostatic loudspeaker
Reexamination Certificate

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Electrostatic ultrasonic transducer drive control method,...

Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker
Reexamination Certificate

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