4. Electrical audio signal processing systems and devices
  5. Binaural and stereophonic

Toshikazu Yoshimi

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Audio amplifier device

Amplifiers – With plural amplifier channels – Amplifying different frequencies in different channels
Patent

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Automatic level control circuit

Amplifiers – With semiconductor amplifying device – Including gain control means
Patent

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Balanced vehicular speaker system

Electrical audio signal processing systems and devices – Vehicle
Patent

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Communication device having air-borne and solid-borne transmitti

Electrical audio signal processing systems and devices – Hearing aids – electrical – Specified casing or housing
Patent

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Earphone

Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent

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Profile ID: LFUS-PAI-P-596257

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