Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6748331 | Computer assisted identification of filamentous bacteria | Qin Zhao, Christopher K. Campana, Enos L. Stover | 2004-06-08 |
| RE37167 | Fatigue resistant drill pipe | — | 2001-05-08 |
| 6012744 | Heavy weight drill pipe | R. Thomas Moore, Wei Tang | 2000-01-11 |
| 5908212 | Ultra high torque double shoulder tool joint | Jackie E. Smith, Thomas E. Winship | 1999-06-01 |
| 5853199 | Fatigue resistant drill pipe | — | 1998-12-29 |
| 5358285 | Stress relief groove for drill pipe | — | 1994-10-25 |
| 5286069 | Stress relief groove for drill pipe | — | 1994-02-15 |
| 5165491 | Method of horizontal drilling | — | 1992-11-24 |
| 5148876 | Lightweight drill pipe | — | 1992-09-22 |
| 4426995 | Solar quilt | — | 1984-01-24 |
| 4368119 | Apparatus for continuous treatment of mixtures | — | 1983-01-11 |