Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8127654 | Perforating guns with reduced internal volume | Harvey Williams, Lawrence A. Behrmann, Jerry D. Campbell | 2012-03-06 |
| 7409993 | Weight spacer apparatus | Chenghua Han, Bennie Gill, Mark C. Duhon, Robert Ferrence, Jerry D. Campbell | 2008-08-12 |