Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9840894 | Drill head and device with a sliding contact electrical connection for drilling a bore in the ground | Alexander Stauffer | 2017-12-12 |
| 8413962 | Device and method for moving a working means in the ground | Manfred Neumann | 2013-04-09 |
| 6591921 | Horizontal boring apparatus | — | 2003-07-15 |
| 6588315 | Ram device | — | 2003-07-08 |
| 6202758 | Compact boring apparatus for making earth bores | — | 2001-03-20 |
| 6189628 | Earth borer system with drill-rod changer | — | 2001-02-20 |
| 6098708 | Apparatus for pulling a pipe into an earth bore | — | 2000-08-08 |
| 6050347 | In Hole hammer | — | 2000-04-18 |
| 5913371 | Apparatus for controlling the feed drive of a boring mechanism for making earth bores | — | 1999-06-22 |
| 5711384 | Anchoring apparatus for the boring wagon of a mobile earth boring mechanism | — | 1998-01-27 |
| 5695014 | Ram boring apparatus | — | 1997-12-09 |
| 5526886 | Ram boring device | — | 1996-06-18 |
| 5492184 | Earth boring device | — | 1996-02-20 |
| 5339909 | Apparatus for making earth bores | Gustav Jenne | 1994-08-23 |
| 5307883 | Method and apparatus for controlling a ramming device | — | 1994-05-03 |
| 5301758 | Method and apparatus for enlarging a bore hole | — | 1994-04-12 |
| 5288173 | Method for the directional control of an earth boring device as well as apparatus for making earth bores | Gustav Jenne | 1994-02-22 |
| 5193627 | Apparatus for controlling a ramming device | — | 1993-03-16 |
| 5094303 | Impact apparatus and process for the control of impact apparatus | — | 1992-03-10 |
| 5050686 | Percussion drill | — | 1991-09-24 |
| 4913243 | Percussion drill and method of controlling same | Gustav Jenne | 1990-04-03 |
| 4821813 | Percussion drilling apparatus | Gustav Jenne | 1989-04-18 |