Issued Patents 2017
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9838817 | Loudspeaker diaphragm and manufacturing method thereof | Yonghua Zhang, Chengzong Ji | 2017-12-05 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9838817 | Loudspeaker diaphragm and manufacturing method thereof | Yonghua Zhang, Chengzong Ji | 2017-12-05 |