Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4941320 | Industrial hydraulic door operator | Otto E. Kersten, George C. Balbach | 1990-07-17 |
| D254364 | Trailer loading ramp | — | 1980-03-04 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4941320 | Industrial hydraulic door operator | Otto E. Kersten, George C. Balbach | 1990-07-17 |
| D254364 | Trailer loading ramp | — | 1980-03-04 |