Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4808265 | Method of washing pulp in a pressure pulp washer adding two washing liquids | Oscar Luthi, Frederick S. Lewis | 1989-02-28 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4808265 | Method of washing pulp in a pressure pulp washer adding two washing liquids | Oscar Luthi, Frederick S. Lewis | 1989-02-28 |