Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D718692 | Exhaust manifold | David Hsu, Charles Madrid | 2014-12-02 |
| D714698 | Exhaust manifold | David Hsu, Charles Madrid | 2014-10-07 |
| D677700 | Intake manifold | David Hsu, Clinton Yee, Ming Wong | 2013-03-12 |