Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11140475 | Sound absorbing material, method for process same and speaker using same | Kun Tang, Hongshu Feng, Hezhi Wang | 2021-10-05 |
| 10939195 | Sound absorbing material and speaker box using same | Hezhi Wang, Hongshu Feng, Guochuang Huang, Kun Tang | 2021-03-02 |