| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 57 | |
| #2 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Chemical engineering | |
| #3 | Mechanical elements | |
| #4 | Civil engineering | |
| #5 | Machine tools | |
| #6 | Thermal processes | |
| #7 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Couplings | |
| #2 | Separation | |
| #3 | Springs | |
| #4 | Railway bodies | |
| #5 | Steam generation | |
| #6 | Sewers | |
| #7 | Making screws | |
| #8 | Machines for making railways | |
| #9 | Gearing | |
| #10 | Lubricating of machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Wilhelm Wurl | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1411199A | Drying apparatus |