Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5031707 | Apparatus for making holes in soil | Nikolai P. Gerasimenko, Leonid M. Bobylev, Alexandr S. Kovalev, Nikolai J. Klimov, Yakov A. Gokhman | 1991-07-16 |
| 4230191 | Machine for making underground excavations | Andrei A. Trofimuk, Gennady G. Vasiliev, Ivan P. Leonov | 1980-10-28 |