Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7569249 | Anvil for a HPHT apparatus | David R. Hall, Timothy C. Duke | 2009-08-04 |
| 7467936 | Radial compression element for a HTHP cartridge | David R. Hall, Ronald B. Crockett, Timothy C. Duke | 2008-12-23 |