Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10919335 | Direct-liquid writing instrument | Yang Wen, Liping Wang | 2021-02-16 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10919335 | Direct-liquid writing instrument | Yang Wen, Liping Wang | 2021-02-16 |