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OPEN-BACK HEADPHONE
Publication number
20250220337
Publication date
Jul 3, 2025
GuoGuang Electric Company, Ltd
Xintai Geng
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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HYBRID DUAL UNIT EARPHONE
Publication number
20250080899
Publication date
Mar 6, 2025
GUOGUANG ELECTRIC COMPANY LIMITED
Dezhi Huang
H04 - ELECTRIC COMMUNICATION TECHNIQUE