Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883123 | Above packer perforate, test and sample tool and method of use | H. Kent Beck, Jon B. Christensen | 1989-11-28 |
| 4877086 | Pressure limiter for a downhole pump and testing apparatus | — | 1989-10-31 |