Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4637476 | Percussive action machine for making holes in the ground | Konstantin Stepanovich Gurkov, Alexandr D. Kostylev, Gennady A. Tkachenko, Vladimir V. Klimashko | 1987-01-20 |
| 4230191 | Machine for making underground excavations | Valentin K. Svirschevsky, Andrei A. Trofimuk, Gennady G. Vasiliev | 1980-10-28 |