Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4454912 | Swab hoist use thereof in conveying crude oil and natural gas | Johann Frohlich, Peter Hanak, Gerhard F. Wawra | 1984-06-19 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4454912 | Swab hoist use thereof in conveying crude oil and natural gas | Johann Frohlich, Peter Hanak, Gerhard F. Wawra | 1984-06-19 |