Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |