Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4496011 | Tool for forming earth holes having fixed walls and method therefor | Valentin I. Feklin | 1985-01-29 |
| 4484640 | Tool for formation of holes in macroporous compressible soils | Valentin I. Feklin, Viktor B. Shvets | 1984-11-27 |