Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6899192 | Drive mechanism for use in a man-driven vehicle | Wei-Pin Chen | 2005-05-31 |
| D487234 | Folding bicycle | Robert Chen, Bob Hadley | 2004-03-02 |
| D484073 | Tricycle | Gregor Heinemann, Robert Hadley, Robert Chen | 2003-12-23 |