Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9039563 | Speed changing apparatus | Shih-Liang Lin, Ming-Chih Tsai | 2015-05-26 |
| 8622865 | Speed change mechanism | — | 2014-01-07 |
| 8388490 | Fixed gear internal gear hub | Hung-Chia Chen | 2013-03-05 |
| 8226517 | Speed change mechanism | Ming-Chih Tsai | 2012-07-24 |