| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 2 | |
| #2 | Germany | 2 | |
| #3 | United States | 2 | |
| #4 | Canada | 1 | |
| #5 | Switzerland | 1 | |
| #6 | France | 1 | |
| #7 | United Kingdom | 1 | |
| #8 | Italy | 1 | |
| #9 | Norway | 1 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Environmental technology | |
| #3 | Engines, pumps and turbines | |
| #4 | Machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Welsch Matthias | 6 |
| Publication | Filing date | Title |
|---|---|---|
| DE4325122A1 | Electric generator | |
| US4007771A | Process for the production of aluminum | |
| DE2415548A1 | Oxygen steel making process - using iron-iron oxide addition to the oxygen blow | |
| US3878993A | Method for producing aluminum pellets |