| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Finland | 2 | |
| #2 | Norway | 2 | |
| #3 | United States | 2 | |
| #4 | Brazil | 1 | |
| #5 | Canada | 1 | |
| #6 | Denmark | 1 | |
| #7 | Japan | 1 | |
| #8 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Heat-exchanger without contact | |
| #2 | Heat-exchange device details | |
| #3 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Oestbo Karl | 10 |
| #2 | Ostro Karl | 1 |
| Publication | Filing date | Title |
|---|---|---|
| WO8501101A1 | A heat exchanger | |
| CA1153362A | Heat exchanger |