Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5667364 | "Downhole hydraulic pump apparatus having a ""free"" jet pump and safety valve assembly and method" | David P. O Mara | 1997-09-16 |
| 5472054 | Free pumping apparatus safety valve system and method | — | 1995-12-05 |