| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 36 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Chemical engineering | |
| #3 | Basic materials chemistry | |
| #4 | Measurement | |
| #5 | Materials and metallurgy |
| # | Technology | |
|---|---|---|
| #1 | Shafts | |
| #2 | Safety devices | |
| #3 | Flotation | |
| #4 | Gas, coke and tar production | |
| #5 | Mining | |
| #6 | Fuels | |
| #7 | Building materials | |
| #8 | Separation | |
| #9 | Separating solids using liquids | |
| #10 | Measuring electric variables |
| # | Name | Total Patents |
|---|---|---|
| #1 | Koormann Heinrich | 9 |
| #2 | Ackerschott Wilhelm | 5 |
| #3 | Heinze Dr Gerald | 4 |
| #4 | Ackerschott Willi | 3 |
| #5 | Schranz Dr-Ing Hubert | 3 |
| #6 | Wetekam Dipl-Ing Hans-Joachim | 3 |
| #7 | Klempt Walter Dr | 2 |
| #8 | Jahns Dr-Ing Hans | 2 |
| #9 | Staehler Albert | 2 |
| #10 | Reerink Wilhelm Dr-Ing | 2 |