Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5339909 | Apparatus for making earth bores | Dietmar Jenne | 1994-08-23 |
| 5288173 | Method for the directional control of an earth boring device as well as apparatus for making earth bores | Dietmar Jenne | 1994-02-22 |