Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4941320 | Industrial hydraulic door operator | Otto E. Kersten, Jack E. Moll | 1990-07-17 |
| 4296570 | Hydraulic door operator | Robert J. Peterman | 1981-10-27 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4941320 | Industrial hydraulic door operator | Otto E. Kersten, Jack E. Moll | 1990-07-17 |
| 4296570 | Hydraulic door operator | Robert J. Peterman | 1981-10-27 |