4. Electrical audio signal processing systems and devices
  5. Including frequency control
  6. Automatic tone control

Katsu Horikoshi

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Automatic loudness control circuit

Electrical audio signal processing systems and devices – Including frequency control – Automatic tone control
Patent

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Bi-directional transmitter/receiver system and...

Pulse or digital communications – Spread spectrum
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1790279

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