4. Telephonic communications
  5. Echo cancellation or suppression

Hiraku Okumura

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Adaptive howling canceller

Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Reexamination Certificate

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Howling frequency component emphasis method and apparatus

Electrical audio signal processing systems and devices – Dereverberators
Reexamination Certificate

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Multi-channel echo cancel method, multi-channel sound...

Telephonic communications – Echo cancellation or suppression
Reexamination Certificate

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Multi-channel echo cancel method, multi-channel sound...

Telephonic communications – Echo cancellation or suppression – Using digital signal processing
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Multi-channel echo cancel method, multi-channel sound...

Telephonic communications – Echo cancellation or suppression
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2236878

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