Issued Patents 2022
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11516588 | Sound production device and portable terminal | Xinglong Wang, Chunfa Liu | 2022-11-29 |
| 11483660 | Sound production apparatus and portable terminal | Xinglong Wang, Guodong Zhao, Chunfa Liu | 2022-10-25 |
| 11477577 | Sounding device and portable terminal | Xinglong Wang, Chunfa Liu | 2022-10-18 |