Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4470457 | Device for the transfer of plugging and grouting materials to, and their processing at, a pre-set level in a well | Nikolai K. Lipatov, Ruben A. Tatevosyan, Arian M. Yakovlev, Lev A. Tereschenko, Boris J. Pyakkonen | 1984-09-11 |
| 4239112 | Plug for eliminating troublesome zones in wells | Viktor F. Rogov, Nikolai K. Lipatov, Ruben A. Tatevosian, Mikhail Y. Titov | 1980-12-16 |