Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5156086 | Method of calendering a paper web | Karl Sipi, Timo Tapani Viitanen | 1992-10-20 |
| 5123340 | Roll for use in calendering a web | Kari Sipi, Timo Tapani Viitanen | 1992-06-23 |