Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |