| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Sweden | 16 | |
| #2 | Canada | 3 | |
| #3 | United States | 3 | |
| #4 | EPO (European Patent Office) | 2 | |
| #5 | France | 2 | |
| #6 | WIPO (World Intellectual Property Organization) | 2 | |
| #7 | Australia | 1 | |
| #8 | Germany | 1 | |
| #9 | Denmark | 1 | |
| #10 | Finland | 1 | |
| #11 | Italy | 1 | |
| #12 | Norway | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Environmental technology | |
| #3 | Machines | |
| #4 | Civil engineering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Thunberg Svante | 31 |
| #2 | Ulfvengren Goeran | 1 |
| Publication | Filing date | Title |
|---|---|---|
| SE9300694D0 | HYGIENE DELEGATED VENTILATION WITH HEAT RECOVERY AND DOT EXTENSION | |
| IT8448999D0 | Ventilation plant with outlet air heat recovery | |
| CA1266652A | Ventilation plant | |
| FI843193A0 | Ventilationsanordning. | |
| WO8402392A1 | Ventilation plant | |
| CA1140914A | Heat exchanger in plants for ventilating rooms or buildings | |
| US4391321A | Heat exchanger in plants for ventilating rooms or buildings | |
| CA971329A | Building with wall plates detachably secured to frame |