Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9038751 | Down-hole hammer drill | Andrew S. Gilbert | 2015-05-26 |
| 8347988 | Down-hole hammer drill | Andrew S. Gilbert | 2013-01-08 |
| 7008966 | Removable filter for slurry hydrocarbon synthesis process | Charles W. DeGeorge | 2006-03-07 |
| 6344490 | Removable filter for slurry hydrocarbon synthesis process | Charles W. DeGeorge | 2002-02-05 |