| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 13 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Materials and metallurgy | |
| #3 | Machines | |
| #4 | Packaging and shipping |
| # | Technology | |
|---|---|---|
| #1 | Furnaces | |
| #2 | Building materials | |
| #3 | Milling | |
| #4 | Pig-iron processing | |
| #5 | Transport or storage devices | |
| #6 | Details of furnaces |
| Publication | Filing date | Title |
|---|---|---|
| DE669719C | Spring roller mill | |
| DE384336C | Rotary grate drive for shaft ovens | |
| DE393880C | Process for operating shaft ovens with wet processed cement raw material |