Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7063282 | Comminuting apparatus | Arvo Jonkka | 2006-06-20 |
| 5992204 | Method of increasing the strength of a blade, and a blade | Arvo Jonkka | 1999-11-30 |
| 5975169 | Feeding method and feeding chute of disc chipper | Arvo Jonkka, Hannu Tahkanen | 1999-11-02 |
| 5765452 | Method for improving the endurance of a blade base of a disc chipper, a blade base of a disc chipper and a disc chipper | Paul Roux, Timothy P. Nettles, Hannu Tahkanen, Arvo Jonkka, Pauli Vienola | 1998-06-16 |
| 5660076 | Drive system of a rotating drum | Arvo Jonkka, Pauli Vienola | 1997-08-26 |
| 5372062 | Method and a press for compressing material having two opposed transfer elements exacting a greater pressing force on the material during a forward motion than the pressing force exerted during a return motion | Arvo Jonkka | 1994-12-13 |
| 5232097 | Screening method and apparatus | — | 1993-08-03 |
| 5134929 | Method and equipment for compressing material consisting of particles | Arvo Jonkka, Esko Unkuri | 1992-08-04 |
| 5111859 | Chipping method and device | Esko Unkuri | 1992-05-12 |