Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4830741 | Method for efficient separation of coal from coal spoil in two stages of hydrocyclonic separation | Istvan Felmeri, Rezso Stum | 1989-05-16 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4830741 | Method for efficient separation of coal from coal spoil in two stages of hydrocyclonic separation | Istvan Felmeri, Rezso Stum | 1989-05-16 |