Showing 1–4 of 4 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Karl Feldhaus | Gewerkschaft Schalker Eisenhutte | 2 |
| 2 | Friedrich Reinke | Fried Krupp | 1 |
| 2 | Hans Jørgen Christensen | Ruhrkohle Ag | 1 |
| 2 | Klaus Dahl | Bergwerksverband Gmbh | 1 |
5 patents · 4 inventors
Ranked #3,857 of 15,417 cities Top 30%
Showing 1–4 of 4 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Karl Feldhaus | Gewerkschaft Schalker Eisenhutte | 2 |
| 2 | Friedrich Reinke | Fried Krupp | 1 |
| 2 | Hans Jørgen Christensen | Ruhrkohle Ag | 1 |
| 2 | Klaus Dahl | Bergwerksverband Gmbh | 1 |