| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Sweden | 5 | |
| #2 | WIPO (World Intellectual Property Organization) | 3 | |
| #3 | Norway | 2 | |
| #4 | Austria | 1 | |
| #5 | Switzerland | 1 | |
| #6 | Germany | 1 | |
| #7 | EPO (European Patent Office) | 1 | |
| #8 | United Kingdom | 1 | |
| #9 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Chemical engineering | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Separation | |
| #2 | Air-conditioning | |
| #3 | Venting or aerating devices | |
| #4 | Domestic heating systems | |
| #5 | Heat-exchanger without contact |
| # | Name | Total Patents |
|---|---|---|
| #1 | Andersson Per Otto | 10 |
| #2 | Andersson Per-Otto | 3 |
| #3 | Otto Andersson Per | 1 |
| #4 | Per Otto Andersson | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US7066974B1 | Device in ventilation ducts provided with adjustable filter means | |
| WO9720615A1 | An arrangement relating to bag-like filters | |
| WO9624430A1 | Bag-type filter device | |
| SE7810465L | Ventilation system for buildings comprised of a cellular floor unit for transport of intake air and waste air | |
| GB1249484A | A valve arrangement comprising a valve body and a throttle member |