Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7601189 | Filtration method and a filter device for removing impurities from the air of a limited space and an apparatus for removing carbon dioxide from the air of an air-raid shelter | Markku Lampinen, Tomi Anttila | 2009-10-13 |