Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7392849 | Balance line safety valve with tubing pressure assist | Donald P. Lauderdale, Roddie R. Smith | 2008-07-01 |
| 7343977 | Translating downhole tool | David Glen Martin | 2008-03-18 |