4. Electrical audio signal processing systems and devices
  5. Binaural and stereophonic
  6. Broadcast or multiplex stereo

Hitoshi Kajiwara

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Electronic volume control circuit for audio devices

Amplifiers – Variable impedance for signal channel controlled by separate...
Patent

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Equalizer apparatus

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

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Equalizer apparatus having two dimensional display

Electrical audio signal processing systems and devices – Including frequency control – Having automatic equalizer circuit
Patent

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Profile ID: LFUS-PAI-P-833497

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