Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4819741 | Reversiele percussion device | Alexei D. Terskov, Vladimir D. Plavskikh, Alexandr D. Kostylev, Nikolai Grigorievich Nazarov, Nikolai P. Chepurnoi +1 more | 1989-04-11 |
| 4398609 | Apparatus for sinking wells in the ground | Andron T. Karavaev, Vladimir D. Plavskikh, Alexei D. Terskov, Anatoly V. Sukhushin, Nikolai P. Chepurnoi | 1983-08-16 |