Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6401840 | Method of extracting and testing a core from a subterranean formation | Arthur D. Hay, Volker Krueger | 2002-06-11 |
| 6148933 | Steering device for bottomhole drilling assemblies | Arthur D. Hay, Volker Krueger | 2000-11-21 |
| 5957221 | Downhole core sampling and testing apparatus | Arthur D. Hay, Volker Krueger | 1999-09-28 |