4. Electrical audio signal processing systems and devices
  5. Electro-acoustic audio transducer
  6. Plural or compound reproducers

Marcia R. Brumitt

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Near-field speaker/microphone acoustic/seismic dampening...

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Plural or compound reproducers
Reexamination Certificate

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Noise reduction method and apparatus

Data processing: generic control systems or specific application – Specific application – apparatus or process – Digital audio data processing system
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2696545

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