Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4209070 | Air-operated self-propelling rotary-percussive downhole drill | Boris V. Sudnishnikov, Veniamin V. Kamensky, Eduard P. Varnello, Sergei K. Tupitsyn | 1980-06-24 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4209070 | Air-operated self-propelling rotary-percussive downhole drill | Boris V. Sudnishnikov, Veniamin V. Kamensky, Eduard P. Varnello, Sergei K. Tupitsyn | 1980-06-24 |