Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8297365 | Drilling string back off sub apparatus and method for making and using same | — | 2012-10-30 |
| 5653298 | Vortex method | Stephen K. Smith, W. Gerald Lott | 1997-08-05 |
| 5632349 | Vortex drill bit | Stephen K. Smith, W. Gerald Lott | 1997-05-27 |
| 5494124 | Negative pressure vortex nozzle | Stephen K. Smith | 1996-02-27 |