Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6896076 | Rotating drilling head gripper | John E. Nelson, Charles B. Smith | 2005-05-24 |
| 6734805 | Composite pipe telemetry conduit | — | 2004-05-11 |
| 6457529 | Apparatus and method for returning drilling fluid from a subsea wellbore | Ian Calder, John E. Nelson | 2002-10-01 |
| 6450507 | Water ingress seal for tapered seals | — | 2002-09-17 |