Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6260861 | Variable traction wheel for in-line roller skate | Albert C. Chiang, John A. Roderick, David R. Willis | 2001-07-17 |
| 5829757 | Variable traction wheel for in-line roller skate | Albert C. Chiang, John A. Roderick, David R. Willis | 1998-11-03 |