Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9981373 | Ratchet wrench | Tsan-Lung Chen, Wen-Hao Yu | 2018-05-29 |
| 9463568 | Hex key wrench system | Tsan-Lung Chen | 2016-10-11 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9981373 | Ratchet wrench | Tsan-Lung Chen, Wen-Hao Yu | 2018-05-29 |
| 9463568 | Hex key wrench system | Tsan-Lung Chen | 2016-10-11 |