Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6394198 | Frictional vibration damper for downhole tools | David R. Hall | 2002-05-28 |
| 6390181 | Densely finned tungsten carbide and polycrystalline diamond cooling module | David R. Hall | 2002-05-21 |
| 6392317 | Annular wire harness for use in drill pipe | David R. Hall | 2002-05-21 |