Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11890714 | Remanufacturing method of drill | Chia-Li Tao, Nick Sung-Hao CHIEN, Chen-Kuang Sun, Cheng-Chia Lee, Ming Zhao | 2024-02-06 |
| 10661357 | Drill structure | Sung-Hao CHIEN, Feng-Yu Lin, Cheng-Chia Lee, Ming Zhao, Chun-Yu Chen | 2020-05-26 |
| 10596641 | Drill structure | Sung-Hao CHIEN, Feng-Yu Lin, Ming Zhao, Chun-Yu Chen | 2020-03-24 |