Issued Patents 2011
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8020637 | Downhole lubrication system | David R. Hall, Michael Beazer, Casey Webb | 2011-09-20 |
| 7954401 | Method of assembling a drill bit with a jack element | David R. Hall, Joe Fox, Tyson J. Wilde | 2011-06-07 |
| 7926883 | Spring loaded pick | David R. Hall, Ronald B. Crockett | 2011-04-19 |
| 7908851 | Hydraulic energy storage with reinforced layer | David R. Hall, Jacob Hannon, Tyson J. Wilde, Boyd Black | 2011-03-22 |
| 7891453 | Energy storage in an elastic vessel | David R. Hall, Jacob Hannon | 2011-02-22 |