4. Electrical audio signal processing systems and devices
  5. Switching

Norio Etoh

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Audio processing apparatus

Electrical audio signal processing systems and devices – Switching
Reexamination Certificate

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Multichannel amplifier

Electrical audio signal processing systems and devices – Binaural and stereophonic – Stereo speaker arrangement
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Volume control apparatus and volume control program

Electrical audio signal processing systems and devices – Including amplitude or volume control – With manual volume control
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Profile ID: LFUS-PAI-P-2290267

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