| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 4 | |
| #2 | United Kingdom | 4 | |
| #3 | United States | 3 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Guiding railway traffic | |
| #2 | Electric switches |
| # | Name | Total Patents |
|---|---|---|
| #1 | Josef Fryba | 3 |
| #2 | Fryba Josef | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB936847A | Train control apparatus | |
| US3169734A | Rail track traffic indicator system | |
| GB905561A | Improvements in or relating to rail contact devices | |
| US3028485A | Deflection rail contactor | |
| US2158931A | Safety and signaling apparatus, in particular for railway crossings | |
| GB474048A | Improvements in and relating to train-operated electric contact devices | |
| GB452493A | Improvements in railway level-crossing operating and signalling systems |