Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6339977 | Reversible ratchet wrench | Yu-Chun Lee | 2002-01-22 |
| 5573093 | Ratchet transmission control mechanism of a screwdriver | — | 1996-11-12 |
| 5094330 | Power transmission mechanism with automatic clutch means | — | 1992-03-10 |