Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6648076 | Gravel pack expanding valve | — | 2003-11-18 |
| 6607032 | Multi-layer screen and downhole completion method | Benn Voll, Elmer R. Peterson, Simon Angelle, Ken Dyson, John L. Baugh | 2003-08-19 |