Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5253705 | Hostile environment packer system | Michael R. Hutto, Tommy L. Stambaugh | 1993-10-19 |
| 4846281 | Dual flapper valve assembly | Frank Giusti, Jr., Richard M. Sproul | 1989-07-11 |