Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6644443 | Transportation device, especially a wheelchair, with a braking system | — | 2003-11-11 |
| 6588564 | Hub, especially for bicycles and the like | Stephan Spahr | 2003-07-08 |
| 6557684 | Free-wheeling hub | Stefan Spahr | 2003-05-06 |