Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4795564 | Process for improving the sedimentation and filtering properties of waste waters containing clay minerals | Sandor Doleschall, Andras Gal, Gyula Milley, Gyula Nagy, Tibor Paal | 1989-01-03 |