Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10221626 | Top drive for a drill string | Albrecht Heinrichs, Achim Feldermann, Thomas Dolls | 2019-03-05 |
| 8240638 | Rod assembly driver | Franz-Josef Puttmann, Gerhard Völkel, Frank Prutti | 2012-08-14 |