Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5134929 | Method and equipment for compressing material consisting of particles | Arvo Jonkka, Antti Tohkala | 1992-08-04 |
| 5111859 | Chipping method and device | Antti Tohkala | 1992-05-12 |