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Audio apparatus, audio volume control method in audio...

Electrical audio signal processing systems and devices – Including amplitude or volume control
Reexamination Certificate

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Audio bandwidth expansion

Electrical audio signal processing systems and devices – Sound effects
Reexamination Certificate

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Audio bass frequency enhancement

Electrical audio signal processing systems and devices – Including frequency control – Automatic tone control
Patent

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Audio bass speaker driver circuit

Electrical audio signal processing systems and devices – Including frequency control – Having crossover filter
Patent

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Audio boost circuit

Electrical audio signal processing systems and devices – Including frequency control
Reexamination Certificate

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Audio calibration system

Electrical audio signal processing systems and devices – Monitoring/measuring of audio devices – Loudspeaker operation
Reexamination Certificate

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Audio channel mixing

Electrical audio signal processing systems and devices – Binaural and stereophonic – Pseudo stereophonic
Patent

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Audio channel spatial translation

Electrical audio signal processing systems and devices – Binaural and stereophonic – Quadrasonic
Reexamination Certificate

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Audio characteristic correction system

Electrical audio signal processing systems and devices – Sound effects
Reexamination Certificate

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Audio circuit

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

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Audio circuit

Electrical audio signal processing systems and devices – Binaural and stereophonic – Amplifier
Patent

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Audio circuit

Electrical audio signal processing systems and devices – Binaural and stereophonic – Hearing aid
Patent

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Audio circuit for a television receiver with central speaker pro

Electrical audio signal processing systems and devices – Binaural and stereophonic – Center channel
Patent

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Audio circuit having noise cancelling function

Electrical audio signal processing systems and devices – Noise or distortion suppression – Soft switching – muting – or noise gating
Reexamination Certificate

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Audio circuit producing enhanced ambience

Electrical audio signal processing systems and devices – Binaural and stereophonic
Patent

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Audio circuitry for dynamics reduction

Electrical audio signal processing systems and devices – With amplifier
Reexamination Certificate

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Audio codec with digital level adjustment and flexible channel a

Electrical audio signal processing systems and devices – With mixer
Patent

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Audio coding

Electrical audio signal processing systems and devices – Binaural and stereophonic – Quadrasonic
Reexamination Certificate

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Audio communication control unit

Electrical audio signal processing systems and devices – Binaural and stereophonic – Pseudo stereophonic
Patent

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Audio communication system for a life safety network

Electrical audio signal processing systems and devices – One-way audio signal program distribution – Multiple channel
Patent

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