Top Inventors at Douglas Technical Limited All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Günter Hensel | 5 |
| 2 | Wolfgang Seifert | 5 |
| 3 | Karel Napravnik | 2 |
| #4 | Zdenek Brancuzsky | 2 |
| Rank | Name | Patents |
|---|---|---|
| 1 | Günter Hensel | 5 |
| 2 | Wolfgang Seifert | 5 |
| 3 | Karel Napravnik | 2 |
| #4 | Zdenek Brancuzsky | 2 |