Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6688396 | Integrated modular connector in a drill pipe | Helmut Floerke, Johannes Witte | 2004-02-10 |
| 6439325 | Drilling apparatus with motor-driven pump steering control | Volker Peters | 2002-08-27 |
| 6427783 | Steerable modular drilling assembly | Volker Krueger, Hans H. Rehbock, Thomas Kruspe, Johannes Witte | 2002-08-06 |
| 6393820 | Chain | Steven M. Varnam, Michael Charles Christmas | 2002-05-28 |