Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7559560 | Magic rollator | Qingfeng Li | 2009-07-14 |
| 7497226 | Walker | Qinfeng Li | 2009-03-03 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7559560 | Magic rollator | Qingfeng Li | 2009-07-14 |
| 7497226 | Walker | Qinfeng Li | 2009-03-03 |