| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Norway | 5 | |
| #2 | Finland | 2 | |
| #3 | Sweden | 2 | |
| #4 | Belgium | 1 | |
| #5 | Canada | 1 | |
| #6 | Switzerland | 1 | |
| #7 | Denmark | 1 | |
| #8 | EPO (European Patent Office) | 1 | |
| #9 | Spain | 1 | |
| #10 | Italy | 1 | |
| #11 | United States | 1 | |
| #12 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Control |
| # | Technology | |
|---|---|---|
| #1 | Domestic heating systems | |
| #2 | Fluid heaters | |
| #3 | Systems controlling non-electric variables |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kolle Kjell | 12 |
| #2 | Johannessen Svein | 6 |
| #3 | Kolle K | 4 |
| #4 | Johannessen S | 2 |
| #5 | Johannesen Svein | 1 |
| Publication | Filing date | Title |
|---|---|---|
| SE8204403D0 | Six-section water heater | |
| WO8002352A1 | Method and apparatus for regulating the temperature of a heating element in a water heater | |
| CH624474A5 | Hot-water installation with a large number of hot-water accumulators |