Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4776407 | Clamping attachment to a device for driving rod elements of low rigidity into the ground | Alexandr D. Kostylev, Boris N. Smolyanitsky, Alexei D. Terskov, Vladimir P. Boginsky, Jury N. Syryamin | 1988-10-11 |
| 4722403 | Annular air-hammer apparatus for drilling holes | Alexandr D. Kostylev, Boris N. Smolyanitsky, Vladimir P. Boginsky, Jury N. Syryamin, David Kogan +2 more | 1988-02-02 |
| 4709768 | Annular air hammer apparatus for drilling wells | Alexandr D. Kostylev, Vladimir P. Boginsky, Boris N. Smolyanitsky, Jury N. Syryamin, David Kogan +1 more | 1987-12-01 |
| 4705119 | Annular air-hammer apparatus for drilling holes | Alexandr D. Kostylev, Boris N. Smolyanitsky, Vladimir P. Boginsky, David Kogan, Oleg V. Smirnov +1 more | 1987-11-10 |