4. Electrical audio signal processing systems and devices
  5. Acoustical noise or sound cancellation
  6. Adjacent ear

Katsuyoshi Nagayasu

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Communication system using short range radio communication...

Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate

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Noise cancellor

Electrical audio signal processing systems and devices – Acoustical noise or sound cancellation – Adjacent ear
Patent

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Ventilator for elevator cage

Ventilation – Elevator
Patent

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Profile ID: LFUS-PAI-P-1345032

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