Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7117938 | Drill pipe connecting and disconnecting apparatus | William R. Hamilton, David Fletcher | 2006-10-10 |
| 5660087 | Drill pipe spinner | — | 1997-08-26 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7117938 | Drill pipe connecting and disconnecting apparatus | William R. Hamilton, David Fletcher | 2006-10-10 |
| 5660087 | Drill pipe spinner | — | 1997-08-26 |