| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 2 | |
| #2 | Austria | 1 | |
| #3 | Australia | 1 | |
| #4 | Canada | 1 | |
| #5 | Switzerland | 1 | |
| #6 | German Democratic Republic | 1 | |
| #7 | Denmark | 1 | |
| #8 | Spain | 1 | |
| #9 | Finland | 1 | |
| #10 | France | 1 | |
| #11 | United Kingdom | 1 | |
| #12 | Italy | 1 | |
| #13 | Norway | 1 | |
| #14 | Poland | 1 | |
| #15 | Portugal | 1 | |
| #16 | Sweden | 1 | |
| #17 | Yugoslavia (Serbia and Montenegro) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes |
| # | Technology | |
|---|---|---|
| #1 | Fluid heaters | |
| #2 | Solid fuel combustion |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ackermann Karl | 9 |
| #2 | Ackermann K | 3 |
| #3 | Ackerman Karl | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DK484780A | Boiler with multiple combustion zones HOW TO FIRE WITH SOLID AND LIQUID FUELS | |
| DE2927152A1 | Solid and liquid fuel fired furnace - has body with afterburner chamber between loading shaft and combustion chamber | |
| DE2909720A1 | MULTI-AREA COMBUSTION STOVES HEATABLE WITH SOLIDS AND LIQUID FUELS |