Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7165635 | Deflection swivel and method | Douglass B. Leeth, John Lemke, Max H. Smith | 2007-01-23 |
| 7131497 | Articulated drillstring entry apparatus and method | Charles M. Helms, Douglas B. Leeth, John Lemke, Max H. Smith | 2006-11-07 |
| 7100699 | High tensile loading top entry sub and method | Charles M. Helms, Billy Dan Jones | 2006-09-05 |
| 6907934 | Universal top-drive wireline entry system bracket and method | Dwight Reuben LeBlanc | 2005-06-21 |