| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Czechoslovakia | 11 | |
| #2 | German Democratic Republic | 3 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Clutches and brakes | |
| #2 | Couplings | |
| #3 | Vehicle brake control systems | |
| #4 | Railway brakes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hille Wolfram | 14 |
| #2 | Habel Lutz | 1 |
| #3 | Streichert Udo | 1 |
| #4 | Schmidt Dieter | 1 |
| #5 | Rietzkow Gerda | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DD155692A3 | Air-operated display device for the mounting state of railway brakes | |
| DD153964A3 | Three-pressure control devices, preferably for railway pressure air braking devices | |
| CS187577B1 | Control system for automatic locking of organs for air closure at the couplings of the central couplers pipelines | |
| DD153963A3 | Three-pressure equipment, preferably for railway pressure air brakes |