| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 8 | |
| #2 | Canada | 1 | |
| #3 | Germany | 1 | |
| #4 | Denmark | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Environmental technology | |
| #3 | Chemical engineering | |
| #4 | Civil engineering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kurt Brunnschweiler | 7 |
| #2 | Brunnschweiler Kurt | 3 |
| Publication | Filing date | Title |
|---|---|---|
| CH586378A5 | Geothermal energy collector with sunk tubes - has vertical shaft with horizontal branches for steam generation | |
| CA470100A | Apparatus for recovering heat from room waste air for preheating the inflowing fresh air |