Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8141883 | Self-locking mechanism of manually tightened drill chuck | Zhenqian Hu, Luwen Zhang | 2012-03-27 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8141883 | Self-locking mechanism of manually tightened drill chuck | Zhenqian Hu, Luwen Zhang | 2012-03-27 |