Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6444329 | Method of preserving plywood and particle board against decay and mould | Markku Lehtonen, Markku Lahteenmaki, Jaakko Korpela | 2002-09-03 |
| 5582871 | Method for preserving wood against undesirable reactions caused by microorganisms | Petri Silenius, Liisa Viikari | 1996-12-10 |
| 5538670 | Wood preservation method and wood preservative | Liisa Viikari, Leena Paajanen, Tiina Mattila-Sandholm | 1996-07-23 |