Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6679324 | Downhole device for controlling fluid flow in a well | Johannis Josephus Den Boer, Astrid Hartwijk, Gerald Sommerauer | 2004-01-20 |
| 6675888 | Method and system for moving equipment into and through an underground well | Hagen Schempf, Steve J. Kimminau, Johannis Josephus Den Boer, Aarnoud Frederic Bijleveld | 2004-01-13 |