Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12352311 | Structurally enhanced ball bearing | — | 2025-07-08 |
| D508387 | Cordless electric ratchet wrench | Chih-Hua Hsu, Chen-Chen Cheng | 2005-08-16 |
| 6915721 | Cordless ratchet wrench | Chih-Hua Hsu, Chen-Chen Cheng | 2005-07-12 |
| D506375 | Cordless electric ratchet wrench | Chih-Hua Hsu, Chen-Chen Cheng | 2005-06-21 |
| 6817424 | Adjustable housing for a hand tool | Chen-Chen Cheng | 2004-11-16 |
| D484382 | Cordless screwdriver | — | 2003-12-30 |