Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4796956 | Machine for driving workings in hard rocks | Petr Y. Fadeev, Vladimir Y. Fadeev, Rim A. Kulagin, Nikolai P. Ermilov | 1989-01-10 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4796956 | Machine for driving workings in hard rocks | Petr Y. Fadeev, Vladimir Y. Fadeev, Rim A. Kulagin, Nikolai P. Ermilov | 1989-01-10 |