Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4823889 | Downhole screw motor | Dmitry F. Baldenko, Leonid A. Kondratenko | 1989-04-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4823889 | Downhole screw motor | Dmitry F. Baldenko, Leonid A. Kondratenko | 1989-04-25 |