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

Jeffery James Coombs

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Loudspeaker frequency distribution and adjusting circuit

Electrical audio signal processing systems and devices – Including frequency control – Having crossover filter
Reexamination Certificate

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Loudspeaker grill

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

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Profile ID: LFUS-PAI-P-2455211

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