Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6675888 | Method and system for moving equipment into and through an underground well | Hagen Schempf, Johannis Josephus Den Boer, John Foreman Stewart, Aarnoud Frederic Bijleveld | 2004-01-13 |
| 6454011 | Method and system for moving equipment into and through a conduit | Hagen Schempf, Hans J. J. den Boer, John Foreman Stewart, A. F. Bijleveld | 2002-09-24 |
| 6241028 | Method and system for measuring data in a fluid transportation conduit | Aarnoud Frederic Bijleveld, Hans J. J. den Boer, John Foreman Stewart, Jerry L. Morris, Hagen Schempf | 2001-06-05 |