Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4637496 | Elevator rail system | Oscar Gilliland | 1987-01-20 |
| 4566561 | Selector cabling arrangement | — | 1986-01-28 |
| 4399685 | Force and kinetic energy measuring device | — | 1983-08-23 |
| 4201053 | Telescopic cylinder automatic synchronizer | — | 1980-05-06 |