Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5632593 | Vehicle lift with tapered contact sensor | — | 1997-05-27 |
| 5165839 | Wheelchair lift for railway cars | — | 1992-11-24 |
| 5158419 | Wheelchair lift for transit vehicles having elevated passenger compartment floor | Dale Kempf | 1992-10-27 |
| 5110252 | Wheelchair lift for transit vehicles having elevated passenger compartment floor | — | 1992-05-05 |