Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4919728 | Method of manufacturing nonmagnetic drilling string components | Heinz Kohl, Helmut Pohl | 1990-04-24 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4919728 | Method of manufacturing nonmagnetic drilling string components | Heinz Kohl, Helmut Pohl | 1990-04-24 |