Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4492372 | Amusement helicopter | Allan L. Lorence, Thomas L. Maring | 1985-01-08 |
| 4422562 | Ground control system | — | 1983-12-27 |
| 4230280 | Vehicular spreader with digital electronic ground speed link | Theodore M. Leigh | 1980-10-28 |