| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 16 | |
| #2 | Switzerland | 3 | |
| #3 | United Kingdom | 3 | |
| #4 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Textiles and paper | |
| #2 | Chemical engineering | |
| #3 | Environmental technology | |
| #4 | Engines, pumps and turbines | |
| #5 | Thermal processes |
| # | Technology | |
|---|---|---|
| #1 | Typewriters | |
| #2 | Separation | |
| #3 | Internal-combustion piston engines | |
| #4 | Climate change mitigation in transportation | |
| #5 | Water treatment | |
| #6 | Preheating for stem generation |
| # | Name | Total Patents |
|---|---|---|
| #1 | Gustav Leidenroth | 4 |
| Publication | Filing date | Title |
|---|---|---|
| GB195609A | Improvements relating to the fuel injection and ignition devices in internal combustion engines | |
| GB189141A | Condensing steam locomotive | |
| DE425164C | Internal combustion engine with antechamber | |
| GB168855A | Improvements in tabulating devices for typewriting machines | |
| US1489536A | Line-spacing mechanism for typewriting machines |