Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5692576 | Locating device for percussion boring machines | Joachim Schmidt | 1997-12-02 |
| 5642786 | Securing and tensioning device for a towing cable connected to a percussion boring machine | Franz-Josef Puttmann | 1997-07-01 |