Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7562726 | Device for drilling a bore in the ground | Peter Heinrichs | 2009-07-21 |
| 6484820 | Method and device for driving bore-holes, especially in the sea bed, using a guide tip | Hermann Josef Von Wirth | 2002-11-26 |
| 6422324 | Method and device for driving bore-holes, in the sea bed using a counterflush method | Hermann Josef Von Wirth | 2002-07-23 |
| 6405812 | Drilling tool for the air-lifting process | — | 2002-06-18 |
| 6183165 | Process and device for separation of pipes or columns fixed in the ground | Peter Heinrichs | 2001-02-06 |
| 6102139 | Device for drilling a bore hole in the ground | Peter Heinrichs | 2000-08-15 |
| 4750770 | Device for connecting a drill column to a pipe or the like | — | 1988-06-14 |
| 4637659 | Tool member for a rotary drilling tool | — | 1987-01-20 |
| 4454923 | Holding device for boring head tools or the like | — | 1984-06-19 |
| 4279315 | Apparatus for extracting cores | — | 1981-07-21 |