4. Recording, communication, or information retrieval equipment
  5. Video or audio transmission, recording or playback equipment
  6. Speaker or housing therefor

Lung-Tan Chen

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Arc-shaped loudspeaker housing

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

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Ring-connected surveillance system with real-time backup...

Multiplex communications – Fault recovery – Bypass an inoperative station
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2737274

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