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

Chi-Lin Hong

Inventor

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Inventor

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Hands free microphone and earphone

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

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Tri-functional dual earphone device

Electrical audio signal processing systems and devices – Headphone circuits
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2432985

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