Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5228526 | Overflow valve of drill string | Andrei N. Vshivkov, Anatoly M. Kochnev, Gennady A. Schelkonogov, Mikhail G. Bobrov | 1993-07-20 |
| 5221197 | Working member of a helical downhole motor for drilling wells | Anatoly M. Kochnev, Andrei N. Vshivkov | 1993-06-22 |
| 4909337 | Rotor of a screw hydraulic downhole motor, method for its production and a device for its production | Anatoly M. Kochnev, Andrei N. Vshivkov, Samuil S. Nikomarov | 1990-03-20 |
| 4556398 | Hinge joint for a screw planetary hydraulic drill | Dmitry F. Baldenko, Yury V. Vadetsky, Moisei T. Gusman, Anatoly M. Kochnev, Samuil S. Nikomarov +1 more | 1985-12-03 |
| 4449953 | Articulated coupling | Samuil S. Nikomarov, Anatoly M. Kochnev, Jury M. Sarapulov, Isaak Y. Valdman | 1984-05-22 |