4. Electrical audio signal processing systems and devices
  5. Including amplitude or volume control
  6. Automatic

Rockford Corporation

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Audio amplifier system with improved isolation between preamplif

Electrical audio signal processing systems and devices – Noise or distortion suppression – Hum or ground loop
Patent

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Audio speaker cone

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Element or attachment
Design Patent

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Automotive audio system

Electrical audio signal processing systems and devices – Vehicle
Patent

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Automotive audio system

Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Patent

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Cyberoptic audio level control system

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

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Profile ID: LFUS-PAI-P-338391

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