Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4754820 | Drilling head with bayonet coupling | Eric G. Dodd | 1988-07-05 |
| 4201392 | High and low pressure seal | — | 1980-05-06 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4754820 | Drilling head with bayonet coupling | Eric G. Dodd | 1988-07-05 |
| 4201392 | High and low pressure seal | — | 1980-05-06 |