Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4854819 | Method and apparatus for pumping fibre suspensions | — | 1989-08-08 |
| 4842688 | Method of removing macromolecular organic dissolved and colloidal material from wood processing industry effluents | Pertti Hynninen | 1989-06-27 |
| 4826398 | Medium consistency pump with self-feeding | — | 1989-05-02 |
| 4812207 | Method of removing lignin from bleach plant effluents | Pertti Hynninen | 1989-03-14 |