Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5876296 | Gear shifting sprocket set for bicycle chain wheel | Pai-Hsiang Hsu, Chang-Dau Yan | 1999-03-02 |
| 5863270 | Self-contained change speed apparatus for use on a bicycle | Caesar Chen, Yu-Ming Huang, Ching-Huei Wu | 1999-01-26 |
| 5855530 | Speed-changing transmission hub for a bicycle | Yu-Ming Huang, Caesar Chen, Ching-Huei Wu | 1999-01-05 |
| 5733215 | Multi-speed sprocket assembly of a bicycle | Pai-Hsiang Hsu | 1998-03-31 |