4. Electrical audio signal processing systems and devices
  5. Monitoring of sound
  6. Amplification control responsive to ambient sound

Yuji Kaihotsu

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Data accumulating method and apparatus

Dynamic magnetic information storage or retrieval – Recording for changing duration – frequency or redundant...
Reexamination Certificate

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Sound reproduction apparatus

Electrical audio signal processing systems and devices – Monitoring of sound – Amplification control responsive to ambient sound
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Profile ID: LFUS-PAI-P-1252805

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