| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 14 | |
| #2 | Austria | 1 | |
| #3 | Switzerland | 1 |
| # | Industry | |
|---|---|---|
| #1 | Furniture and games | |
| #2 | Machine tools | |
| #3 | Materials and metallurgy | |
| #4 | Surface technology and coating |
| # | Technology | |
|---|---|---|
| #1 | Skates | |
| #2 | Grinding or polishing devices | |
| #3 | Making forged metal products | |
| #4 | Coating metallic material | |
| #5 | Metal tempering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Dornseif Erich | 10 |
| #2 | Dornseif Hugo | 3 |
| #3 | Hugo Dornseif Hudora-Werk | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE911227C | Impeller, especially roller for roller skates |