Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5174722 | Safety shutdown circuit for pneumatic pump system | — | 1992-12-29 |
| 4850094 | Method for mounting gate opener | — | 1989-07-25 |
| 4638597 | Modular automatic gate opener | — | 1987-01-27 |
| 4416085 | Automatic gate opener | Karl A. Senghaas, James W. Olafson | 1983-11-22 |
| 4202490 | Drill pipe identification method and system | Walter A. Gunkel | 1980-05-13 |