Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D982082 | Drawing board | Zhitian Li, Lizhu Liu | 2023-03-28 |
| D966410 | Writing board with pen set | Zhitian Li, Lizhu Liu | 2022-10-11 |
| D933622 | Liquid crystal screen | Zhitan Li, Lizhu Li | 2021-10-19 |