| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 18 |
| # | Industry | |
|---|---|---|
| #1 | Basic materials chemistry | |
| #2 | Thermal processes | |
| #3 | Materials and metallurgy | |
| #4 | Environmental technology | |
| #5 | Packaging and shipping | |
| #6 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Gas, coke and tar production | |
| #2 | Furnaces | |
| #3 | Metal tempering | |
| #4 | Milling | |
| #5 | Transport or storage devices | |
| #6 | Reduction of greenhouse gas emissions | |
| #7 | Cremation furnaces | |
| #8 | Burners |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kirchhoff Ludwig | 14 |
| #2 | Vogt Arthur Erich | 2 |
| Publication | Filing date | Title |
|---|---|---|
| DE699766C | Movable kiln for smoldering wood, peat and similar fuels | |
| DE701015C | Movable kiln for smoldering wood, peat and similar fuels | |
| DE633568C | Rotatable furnace for roasting and melting purposes |