Issued Patents 2003
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6668936 | Hydraulic control system for downhole tools | Virgilio Garcia-Soule, Perry C. Shy, Leo G. Collins | 2003-12-30 |
| 6591914 | Hydraulic control system for downhole tools | — | 2003-07-15 |
| 6585051 | Hydraulically operated fluid metering apparatus for use in a subterranean well, and associated methods | Daniel George Purkis, Michael A. Reid | 2003-07-01 |
| 6536530 | Hydraulic control system for downhole tools | Roger L. Schultz, Paul D. Ringgenberg | 2003-03-25 |