Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7669862 | Foldable spider wheel for ascending and descending stairs | Michael Yang, David Follette | 2010-03-02 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7669862 | Foldable spider wheel for ascending and descending stairs | Michael Yang, David Follette | 2010-03-02 |