Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5417806 | Method of removing fine contaminants from used paper fibre material | Bruno Michelewski | 1995-05-23 |
| 4909900 | Method for high temperature, high consistency quick bleaching of raw paper pulp | Harald Selder | 1990-03-20 |