QD

Qiang Dan

AC Aac Kaitai Technologies (Wuhan) Co.: 4 patents #11 of 17Top 65%
AC Aac Microtech (Changzhou) Co.: 1 patents #48 of 83Top 60%
Overall (2024): #30,985 of 561,600Top 6%
5
Patents 2024

Issued Patents 2024

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
12015896 Piezoelectric speaker Yu Shen, Yiwei Zhou, Shiyang Cheng, Yang Li 2024-06-18
11968507 Speaker having first diaphragm, second diaphragm with different stiffness from first diaphragm, and driver located in through hole of first diaphragm Shiyang Cheng, Yiwei Zhou, Yu Shen, Yang Li 2024-04-23
11950070 Sound production device Yu Shen, Shiyang Cheng, Yiwei Zhou, Yang Li 2024-04-02
11910155 MEMS speaker Yiwei Zhou, Yu Shen, Yang Li 2024-02-20
11895464 MEMS speaker and speaker assembly structure Yu Shen, Shiyang Cheng, Yiwei Zhou, Yang Li 2024-02-06