Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7839719 | Fluid erosion protection washer for rotating shaft in MWD tool | Anthony R. Dopf, Trang Le, Derek W. Logan, Timothy Neff, Wendall Siemens | 2010-11-23 |
| 7532540 | Fluid erosion protection washer for rotating shaft in MWD tool | Anthony R. Dopf, Trang Le, Derek W. Logan, Timothy Neff, Wendall Siemens | 2009-05-12 |