Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4764094 | Screw machine having a plurality of symmetrically arranged rotors | Dmitry F. Baldenko, Moisei T. Gusman, Valery I. Semenets, Valentina A. Khabetskaya | 1988-08-16 |
| 4711006 | Downhole sectional screw motor, mounting fixture thereof and method of oriented assembly of working members of the screw motor using the mounting fixture | Dmitry F. Baldenko, Nikolai P. Bezlepkin, Moisei T. Gusman, Jury F. Potapov, Valery I. Semenets | 1987-12-08 |
| 4585401 | Multistage helical down-hole machine with frictional coupling of working elements, and method therefor | Dmitry F. Baldenko, Moisei T. Gusman, Anatoly M. Kochnev, Samuil S. Nikomarov, Valery I. Semenets +3 more | 1986-04-29 |
| 4567953 | Bottom-hole multistart screw motor | Dmitry F. Baldenko, Talgat N. Bikchurin, Moisei T. Gusman, Anatoly M. Kochnev, Samuil S. Nikomarov | 1986-02-04 |
| 4222445 | Reduction unit of drilling motor | Nikolai D. Derkach, Ernst N. Krutik, Georgy F. Chudakov, Nikolai P. Stroitelev, Alexandr P. Natarov +3 more | 1980-09-16 |