4. Electrical audio signal processing systems and devices
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Surveillance microphone holder

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Thermal response to – or generation of – sound vibration
Patent

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Suspended speaker system

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Plural or compound reproducers
Patent

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Suspension for high power pleated ribbon transducer

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electromagnetic
Patent

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Suspension for microphones

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Housed microphone
Reexamination Certificate

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Suspension means for transducer

Electrical audio signal processing systems and devices – Hearing aids – electrical – Specified casing or housing
Reexamination Certificate

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Suspension means for transducer

Electrical audio signal processing systems and devices – Hearing aids – electrical – Specified casing or housing
Reexamination Certificate

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Suspension mount for loudspeakers

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having electrostatic element
Patent

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Suspension mount for sound reproduction devices according to the

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electromagnetic
Patent

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Swimming training device

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

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Swimming training device with removable receiver disposed therei

Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent

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Switch for a body-worn electronic device

Electrical audio signal processing systems and devices – Hearing aids – electrical – Specified casing or housing
Reexamination Certificate

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Switch responsive to an audio cue

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

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Switched amplifier

Electrical audio signal processing systems and devices – Sound effects – Reverberators
Patent

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Switched capacitor bandpass filter for detecting pilot signal

Electrical audio signal processing systems and devices – Binaural and stereophonic – Broadcast or multiplex stereo
Patent

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Switched capacitor filter with a neutral bypass setting

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

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Switched capacitor pilot phase and magnitude detector

Electrical audio signal processing systems and devices – Binaural and stereophonic – Broadcast or multiplex stereo
Patent

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Switched microphone buffer

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

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Switched signal processing circuit

Electrical audio signal processing systems and devices – Binaural and stereophonic – Broadcast or multiplex stereo
Patent

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Switched signal processing circuit

Electrical audio signal processing systems and devices – Binaural and stereophonic – Broadcast or multiplex stereo
Reissue Patent

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Switching arrangement for a stereophonic sound synthesizer

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

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