Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10495067 | Mechanical power conversion device | — | 2019-12-03 |
| 9194474 | Ring disk reciprocating power conversion device | — | 2015-11-24 |
| 6565466 | Bicycle derailleur gearshift position indicator | Yu-Chen Chen | 2003-05-20 |
| 6497163 | Dual dial rods speed changing controller capable of linear displacement | Yu-Chen Chen | 2002-12-24 |
| 6397700 | Dual dial rod speed changing indicator | Yu-Chen Chen | 2002-06-04 |