| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Electrical machinery and energy | |
| #3 | Machines | |
| #4 | Transport | |
| #5 | Basic materials chemistry | |
| #6 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Construction of roads | |
| #2 | Milling | |
| #3 | Lighting device details | |
| #4 | Portable lighting devices | |
| #5 | Indexing scheme for uses of lighting devices | |
| #6 | Lubricating | |
| #7 | Motor vehicles | |
| #8 | Working-up pitch | |
| #9 | Load transportation vehicles |
| # | Name | Total Patents |
|---|---|---|
| #1 | Gerling Andreas | 1 |
| #2 | Henrich Karl | 1 |
| #3 | Hauske Gerhard | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE651355C | Road roller, the steering roller of which consists of two spaced apart drums | |
| DE662650C | Road roller, the steering roller of which consists of two spaced apart drums |