| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping | |
| #2 | Transport | |
| #3 | Civil engineering | |
| #4 | Engines, pumps and turbines | |
| #5 | Mechanical elements | |
| #6 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Safety devices | |
| #2 | Winches | |
| #3 | Guiding railway traffic | |
| #4 | Siphons | |
| #5 | Railway shifting | |
| #6 | Percussive tools | |
| #7 | Transport or storage devices | |
| #8 | Venting or aerating devices | |
| #9 | Shafts | |
| #10 | Steam traps |
| # | Name | Total Patents |
|---|---|---|
| #1 | Gruender Fritz | 22 |
| #2 | Hoetten Heinz | 9 |
| #3 | Heckmann Guenther | 4 |
| #4 | Kissing Franz | 1 |
| #5 | Schulte Wilhelm | 1 |
| #6 | Brueggemann Hans | 1 |