Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE33595 | Wheelchair lift | Donald B. Sullivan | 1991-05-28 |
| 4556128 | Wheelchair lift | Donald B. Sullivan | 1985-12-03 |
| 4479753 | Wheelchair lift for passenger vehicles | — | 1984-10-30 |
| 4466771 | Wheelchair lift | Donald B. Sullivan | 1984-08-21 |
| 4441850 | Auxiliary step for wheelchair lift | — | 1984-04-10 |
| 4251179 | Wheelchair lift | — | 1981-02-17 |