4. Electrical audio signal processing systems and devices
  5. Monitoring/measuring of audio devices
  6. Loudspeaker operation

William Avery

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Digital recording and playback module system

Electrical audio signal processing systems and devices – Monitoring/measuring of audio devices – Loudspeaker operation
Patent

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Wireless phone-line interface

Telecommunications – Radiotelephone system – Including private cordless extension system
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1169006

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