Issued Patents 2011
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8028774 | Thick pointed superhard material | David R. Hall, Ronald B. Crockett, Jeff Jepson, Scott Dahlgren | 2011-10-04 |
| 8020471 | Method for manufacturing a drill bit | David R. Hall, Ronald B. Crockett | 2011-09-20 |
| 8011457 | Downhole hammer assembly | David R. Hall, Scott Dahlgren | 2011-09-06 |
| 7967082 | Downhole mechanism | David R. Hall | 2011-06-28 |
| 7886851 | Drill bit nozzle | David R. Hall | 2011-02-15 |