Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4687583 | Procedure for filtering lime sludge meant to be regenerated to lime | Holger Engdahl, Raimo Kohonen, Jukka Niskanen, Markku Kosonen | 1987-08-18 |
| 4309283 | Hydrocyclone | Pentti Vikio, Juhani Kyytsonen | 1982-01-05 |
| 4264445 | Pressurized filter | Juha Lumikko, Jaakko Savolainen, Martti Tolvanen, Yrjo Luukkainen, Holger Engdahl | 1981-04-28 |
| 4259180 | Hydrocyclone | Jorma Surakka | 1981-03-31 |