Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7946594 | Drill chuck locked through an inclined wedge surface | — | 2011-05-24 |
| 7637510 | Chuck with gripping mechanism stop | — | 2009-12-29 |
| 7469908 | Power drill chuck | — | 2008-12-30 |
| 7296803 | Chuck | Guimo Yang | 2007-11-20 |
| 7128324 | Hammerlock chuck | Guimo Yang | 2006-10-31 |
| 7125021 | Self-locking drill chuck | — | 2006-10-24 |
| 6848691 | Hammerlock chuck | Guimo Yang | 2005-02-01 |