Issued Patents 2011
Showing 1–1 of 1 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, James R. Higginbotham, Raymond W. Teys, Michael A. Yoshimune | 2011-03-22 |