Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6595555 | Coiled tubing swivel with stepped bearing races | Steven L. Schwegman | 2003-07-22 |
| 6554249 | Plug valve having seal segments with booster springs | Rick Wei-Shou Pang, Sergio Castillo | 2003-04-29 |