Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5447317 | Method for moving a wheelchair over stepped obstacles | Paul R. Gehlsen | 1995-09-05 |
| 5230522 | Apparatus for moving a wheelchair over stepped obstacles | Paul R. Gehlsen | 1993-07-27 |