Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5083755 | Face shock absorber for extracting core-collecting pipes | Nikolay D. Nenkov, Dimo S. Yordanov, Evgeni D. Hromin | 1992-01-28 |
| 4776436 | Face shock absorber | Nikolay D. Nenkov, Dimo S. Yordanov, Botko P. Ivanov | 1988-10-11 |