Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9517398 | Extra-long air-water sandbag | David Fu | 2016-12-13 |
| 9199151 | Inner bladder structure of punching bag | David Fu | 2015-12-01 |
| D675696 | Trainer for martial arts | David Fu | 2013-02-05 |