Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7195428 | Gundrill | Viktor P. Astakhov, Yefim Val | 2007-03-27 |
| 7147411 | Gundrill | Viktor P. Astakhov, Yefim Val | 2006-12-12 |
| 5876155 | Method of eliminating chatter in plunge cutting with cutters at different diameters and depths | Yefim Val, Jide Jin, Mariano Martin, Juhchin Yang | 1999-03-02 |