Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6116800 | Propelling pencil | Guofeng Wang, Dianjun Wang | 2000-09-12 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6116800 | Propelling pencil | Guofeng Wang, Dianjun Wang | 2000-09-12 |