Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11306576 | Directional drilling device and method for calibrating same | — | 2022-04-19 |
| 10914119 | Drilling tool for sinking automatically directionally monitored bores | — | 2021-02-09 |
| 10760400 | Directional drilling device and method for calibrating same | — | 2020-09-01 |
| 5806612 | Apparatus for the transmission of information in a drill string | Dieter Wrobel, Dagobert Feld | 1998-09-15 |
| 5360260 | Tunneling machine with radially sweeping tool carriers | Lothar Baumann, Hans G. Kappelmann, Volkmar Mertens, Bernhard T. Schafeld, Heinz Wallussek | 1994-11-01 |