Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10648258 | Sealing and controlling of fluid pressure in an annular fluid passageway in a wellbore related process | Thomas Walburgis Bakker, Joop Roodenburg | 2020-05-12 |
| 10415316 | Apparatus and method for drilling a directional borehole in the ground | Pieter Dirk Melis Van Duivendijk, Joop Roodenburg | 2019-09-17 |
| 9121239 | Device for anchoring in a casing in a borehole in the ground | Christian Schulte, Konrad Johannes Bührmann, Thomas Walburgis Bakker | 2015-09-01 |