Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4264445 | Pressurized filter | Juha Lumikko, Matti Lankinen, Martti Tolvanen, Yrjo Luukkainen, Holger Engdahl | 1981-04-28 |
| 4243533 | Filters with filtrate chamber overflow partitions having plural outlets | Holger Engdahl, Yrjo Luukkainen, Martti Tolvanen, Jorma Surakka | 1981-01-06 |