Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6736934 | Method of pretreating pulp in an acid tower prior to bleaching with peroxide | Olavi Pikka | 2004-05-18 |
| 6733625 | Method and apparatus for treating pulp | Eero Kontturi, Olavi Pikka, Janne Vehmaa | 2004-05-11 |