Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5228526 | Overflow valve of drill string | Anatoly M. Kochnev, Gennady A. Schelkonogov, Vladimir B. Goldobin, Mikhail G. Bobrov | 1993-07-20 |
| 5221197 | Working member of a helical downhole motor for drilling wells | Anatoly M. Kochnev, Vladimir B. Goldobin | 1993-06-22 |
| 4909337 | Rotor of a screw hydraulic downhole motor, method for its production and a device for its production | Anatoly M. Kochnev, Vladimir B. Goldobin, Samuil S. Nikomarov | 1990-03-20 |