| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 16 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Basic materials chemistry | |
| #3 | Environmental technology | |
| #4 | Machine tools | |
| #5 | Chemical engineering | |
| #6 | Packaging and shipping | |
| #7 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Mining | |
| #2 | Forging | |
| #3 | Reduction of greenhouse gas emissions | |
| #4 | Gas, coke and tar production | |
| #5 | Working-up peat | |
| #6 | Transport or storage devices | |
| #7 | Drying solid materials by removing liquid | |
| #8 | Shafts |
| Publication | Filing date | Title |
|---|---|---|
| DE622763C | Device for uninterrupted processing of fuels and ores in several separate, externally heated chambers | |
| DE622930C | Process for degassing raw lignite |