Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8439114 | Method and apparatus for orienting perforating devices | Robert A. Parrott, David Mills, Jerry D. Campbell | 2013-05-14 |
| 7159657 | Shaped charge loading tube for perforating gun | Wanchai Ratanasirigulchia, Wenbo Yang, Robert A. Parrott | 2007-01-09 |
| 7114564 | Method and apparatus for orienting perforating devices | Robert A. Parrott, David Mills, Jerry D. Campbell | 2006-10-03 |
| 6588508 | Method and apparatus to reduce trapped pressure in a downhole tool | Robert A. Parrott, Haoming Li, Anthony P. Vovers, Harry B. Anderson, John Corben | 2003-07-08 |