| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 13 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Materials and metallurgy | |
| #3 | Chemical engineering | |
| #4 | Packaging and shipping | |
| #5 | Measurement | |
| #6 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Furnaces | |
| #2 | Building materials | |
| #3 | Transport or storage devices | |
| #4 | Measuring volume | |
| #5 | Iron and steel production | |
| #6 | Drying solid materials by removing liquid | |
| #7 | Milling | |
| #8 | Mixing | |
| #9 | Separating solids |
| Publication | Filing date | Title |
|---|---|---|
| DE382906C | Method for firing cement in the undeformed state |