| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 9 | |
| #2 | United States | 3 |
| # | Industry | |
|---|---|---|
| #1 | Basic materials chemistry | |
| #2 | Environmental technology | |
| #3 | Machines | |
| #4 | Materials and metallurgy | |
| #5 | Engines, pumps and turbines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Schmalfeldt Hans | 9 |
| #2 | Hans Schmalfeldt | 3 |
| Publication | Filing date | Title |
|---|---|---|
| US2113774A | Process for the gasification of dust or fine-grained fuels with circulating gas | |
| US2133479A | Method for gasifying finely divided fuel with circulating gas | |
| US2107549A | Process for the reduction of fine iron ores |