4. Electrical audio signal processing systems and devices
  5. One-way audio signal program distribution

Daniel A. Chattin

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Electron turbulence damping circuit for a...

Amplifiers – With semiconductor amplifying device – Including push-pull amplifier
Reexamination Certificate

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Variable damping circuit for a loudspeaker

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

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Voltage biased capacitor circuit for a loudspeaker

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

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Profile ID: LFUS-PAI-P-2786020

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