| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Norway | 2 | |
| #2 | Sweden | 2 | |
| #3 | Austria | 1 | |
| #4 | Canada | 1 | |
| #5 | Switzerland | 1 | |
| #6 | Germany | 1 | |
| #7 | Denmark | 1 | |
| #8 | Finland | 1 | |
| #9 | France | 1 | |
| #10 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Control | |
| #3 | Measurement |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hedly Sven | 9 |
| #2 | Winhammar Lars | 5 |
| Publication | Filing date | Title |
|---|---|---|
| DK434681A | Procedure and apparatus for differentiated charging of heat costs | |
| SE8002576L | Method and apparatus to control the temperature in heated premises | |
| US4035796A | Device for reducing undesired energy consumption in a room provided with heating and/or air conditioning means |