Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7909117 | Downhole adjustable bent-angle mechanism for use with a motor for directional drilling | Donald H. Van Steenwyk, Dennis J. Buckley, Mark Chustz, Raymond W. Teys, Michael A. Yoshimune | 2011-03-22 |
| 7225888 | Hydraulic fluid coupling | Donald H. Van Steenwyk, Raymond W. Teys | 2007-06-05 |
| 5725061 | Downhole drill bit drive motor assembly with an integral bilateral signal and power conduction path | Donald H. Van Steenwyk, Michael S. Orcutt-Clenard | 1998-03-10 |