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

Lap Shun Hui

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Earphone set with detachable speakers or subwoofers

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

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Miniature personal computer

Recording – communication – or information retrieval equipment – Computer – data processor equipment
Design Patent

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Profile ID: LFUS-PAI-P-2322155

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