4. Recording, communication, or information retrieval equipment
  5. Video or audio transmission, recording or playback equipment
  6. Element or attachment

Andrea Electronics Corporation

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Adaptive noise cancellation and speech enhancement system and ap

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

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Boom microphone headset

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Speaker or housing therefor
Patent

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Combined boom microphone headset and stand

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Element or attachment
Patent

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Dual-processing interference cancelling system and method

Electrical audio signal processing systems and devices – Directive circuits for microphones
Reexamination Certificate

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Dual-processing interference cancelling system and method

Electrical audio signal processing systems and devices – Noise or distortion suppression – Using signal channel and noise channel
Reexamination Certificate

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Profile ID: LFUS-PAI-P-420979

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