Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4331207 | Device for reversing the direction of flow of a fluid at the level of a drill bit | — | 1982-05-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4331207 | Device for reversing the direction of flow of a fluid at the level of a drill bit | — | 1982-05-25 |