Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8061431 | Method of operating a pressure cycle operated perforating firing head and generating electricity in a subterranean well | John H. Hales | 2011-11-22 |
| 8006779 | Pressure cycle operated perforating firing head | John H. Hales | 2011-08-30 |