Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5111999 | Arrangement for fastening the grindstone of a pulp grinder to a rotary shaft | — | 1992-05-12 |
| 4664323 | Method of and a feeding device for feeding a wood batch into a pressure grinder | Juhani Ahonen, Pekka Haikkala | 1987-05-12 |
| 4305590 | Sealing arrangement for a shutter of a pressure grinder | Pekka Haikkala, Eero Hanhilahti, Matti Aario | 1981-12-15 |