Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE33595 | Wheelchair lift | Graham R. Thorley | 1991-05-28 |
| 4556128 | Wheelchair lift | Graham R. Thorley | 1985-12-03 |
| 4466771 | Wheelchair lift | Graham R. Thorley | 1984-08-21 |
| 4281517 | Single stage twin piston cryogenic refrigerator | James E. Zimmerman | 1981-08-04 |