Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4718812 | Wheelchair lift with positive automatic handrail | Raymond L. Smalley | 1988-01-12 |
| 4606433 | Step convertible platform lift | Raymond L. Smalley, William D. Sherman | 1986-08-19 |
| 4551056 | Automatic handrail for platform lift | — | 1985-11-05 |
| 4480719 | Lift platform retainer | — | 1984-11-06 |
| 4474527 | Optional manual gravity wheelchair lift | William D. Sherman, Raymond L. Smalley | 1984-10-02 |