4. Electrical audio signal processing systems and devices
  5. Headphone circuits

Chi-Hsiang Chen

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Dual mode headset device

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

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Earphone

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

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Higher fastening screw

Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Thread or shank structure
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2263814

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