Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6334487 | Valve assembly | Thurman B. Caarter, John D. Roberts, William A. Blizzard, Jr., Richard M. Ward | 2002-01-01 |
| 6116336 | Wellbore mill system | Thurman B. Caarter, John D. Roberts, William A. Blizzard, Jr., Richard M. Ward | 2000-09-12 |
| 5743331 | Wellbore milling system | Thurman B. Carter, William A. Blizzard, Jr., Richard M. Ward | 1998-04-28 |