Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4454912 | Swab hoist use thereof in conveying crude oil and natural gas | Johann Frohlich, Josef Gamperl, Gerhard F. Wawra | 1984-06-19 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4454912 | Swab hoist use thereof in conveying crude oil and natural gas | Johann Frohlich, Josef Gamperl, Gerhard F. Wawra | 1984-06-19 |