Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5360260 | Tunneling machine with radially sweeping tool carriers | Lothar Baumann, Hans G. Kappelmann, Volkmar Mertens, Bernhard T. Schafeld, Werner Vorhoff | 1994-11-01 |
| 4784229 | Device, preferably for underground purposes, to transfer information out of a drilling hole | Michael Ostkamper | 1988-11-15 |
| 4596293 | Targetable drill with pressure telemetering of drill parameters | Martin Wiebe | 1986-06-24 |
| 4407374 | Device for controlling the orientation of bore holes | Martin Wiebe, Thomas Röder | 1983-10-04 |