Issued Patents All Time
Showing 1–8 of 8 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 |
| 4913243 | Percussion drill and method of controlling same | Dietmar Jenne | 1990-04-03 |
| 4821813 | Percussion drilling apparatus | Dietmar Jenne | 1989-04-18 |
| 4508181 | Driving head for pneumatic pile drivers | — | 1985-04-02 |
| 4480525 | Control device for forward and backward travel of automatic _pneumatic percussion boring devices | — | 1984-11-06 |
| 4462468 | Ram head for self-driven pneumatic ram drills | — | 1984-07-31 |
| 4284147 | Control device for the forward movement and rearward movement of pneumatic ram boring devices | — | 1981-08-18 |