Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4827741 | Pulp washer discharging a pulp slurry at a controlled consistency | — | 1989-05-09 |
| 4808265 | Method of washing pulp in a pressure pulp washer adding two washing liquids | Frederick S. Lewis, Lawrence A. Carlsmith | 1989-02-28 |