Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885088 | Filter belt press | — | 1989-12-05 |
| 4874468 | Apparatus for the liquid treatment of a fibrous board between two endless foraminous belts or wires | Franz Petschauer | 1989-10-17 |