Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861463 | Vibratory screening machine | — | 1989-08-29 |
| 4839036 | Vibratory screening machine | — | 1989-06-13 |
| 4836385 | Vibratory screening machine | Leonid A. Vaisberg, Leonid K. Balabatko, Veniamin I. Sozykin, Amiran F. Gasseev | 1989-06-06 |