Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8665110 | Transmitting electric power into a bore hole | Ivan Tan Boon Kiat | 2014-03-04 |
| 7347282 | Steerable soil penetration system | Michael John Betts, Pieter Karel Anton Kapteijn, Peter Oosterling, Paul Dirk Schilte, Pleun Marinus Van Der Sman +1 more | 2008-03-25 |
| 7318343 | System for detecting gas in a wellbore during drilling | — | 2008-01-15 |
| 6305469 | Method of creating a wellbore | Leo Maekiaho | 2001-10-23 |
| 6241029 | Earth formation surveying device | Barend Jan Pestman | 2001-06-05 |
| 6176313 | Method and tool for fracturing an underground formation | Cornelis Jan Kenter, Djurre Hans Zijsling | 2001-01-23 |