Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4683960 | Air-operated reversible percussive action machine | Alexandr D. Kostylev, Vasily I. Ivinsky, Alexandr D. Filonov | 1987-08-04 |
| 4637476 | Percussive action machine for making holes in the ground | Konstantin Stepanovich Gurkov, Alexandr D. Kostylev, Gennady A. Tkachenko, Ivan P. Leonov | 1987-01-20 |
| 4606414 | Percussive air tool | Nikolai P. Chepurnoi, Vladimir D. Makeev, Vladimir P. Naboko, Alexandr D. Filonov, Petr N. Svita | 1986-08-19 |
| 4181484 | Device for forming underground pipelines | Alexandr D. Kostylev, Konstantin Stepanovich Gurkov, Vladimir D. Plavskikh, Leonid Rozhkov, Vladimir A. Grigoraschenko +4 more | 1980-01-01 |