Assignee

FENG HONGSHU

CN·1 granted patent·1 citations·filing 2017–2017

Technology mixC01B1 C01P1 G10K1 H04R1

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0173US10271130B2Sound absorbing material and manufacturing method thereof and speaker using sound absorbing materialFENG HONGSHU·Filed 2017·Granted Apr 23, 2019·1 cites·13 claims

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