Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4823889 | Downhole screw motor | Dmitry F. Baldenko, Leonid A. Kondratenko | 1989-04-25 |
| 4764094 | Screw machine having a plurality of symmetrically arranged rotors | Dmitry F. Baldenko, Jury V. Vadetsky, Moisei T. Gusman, 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, Jury V. Vadetsky, Moisei T. Gusman, Jury F. Potapov | 1987-12-08 |
| 4585401 | Multistage helical down-hole machine with frictional coupling of working elements, and method therefor | Dmitry F. Baldenko, Jury V. Vadetsky, Moisei T. Gusman, Anatoly M. Kochnev, Samuil S. Nikomarov +3 more | 1986-04-29 |
| 4556398 | Hinge joint for a screw planetary hydraulic drill | Dmitry F. Baldenko, Yury V. Vadetsky, Vladimir B. Goldobin, Moisei T. Gusman, Anatoly M. Kochnev +1 more | 1985-12-03 |
| 4518049 | Bottom hole motor for driving rock-breaking tool | Dmitry F. Baldenko, Moisei T. Gusman | 1985-05-21 |
| 4470464 | Valve means | Dmitry F. Baldenko, Nikolai P. Bezlepkin | 1984-09-11 |