Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5139671 | Apparatus for treating pulp | Kaj Henricson, Olavi Pikka, Harri Qvintus, Erkki A. Ruuskanen, Erkki Savolainen | 1992-08-18 |
| 5116423 | Apparatus for washing pulp | Harri Qvintus | 1992-05-26 |
| 4952314 | Apparatus for treating pulp | Kaj Henricson, Olavi Pikka, Harri Qvintus, Erkki A. Ruuskanen, Erkki Savolainen | 1990-08-28 |
| 4919158 | Method and apparatus for washing pulp | Harri Qvintus | 1990-04-24 |
| 4795170 | Packing arrangement for sealing the surface of a rotary drum like object | Harri Qvintus, Erkki A. Ruuskanen | 1989-01-03 |
| 4769986 | Apparatus for washing cellulose with a rotary drum | Harri Qvintus | 1988-09-13 |
| 4608174 | Feed and accept duct system for hydrocyclones | Antti Kuhasalo, Erkki Savolainen, Juha Titoff, Jorma Vento, Pentti Vikio | 1986-08-26 |