| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 18 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Electrical machinery and energy | |
| #3 | Machines | |
| #4 | Measurement | |
| #5 | Chemical engineering | |
| #6 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Guiding railway traffic | |
| #2 | Electric switches | |
| #3 | Vehicle brake control systems | |
| #4 | Unspecified technologies | |
| #5 | Separation | |
| #6 | Time-interval measuring | |
| #7 | Mechanical control devices | |
| #8 | Railway brakes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Thurber Guy P | 10 |
| #2 | Gray Gardner B | 8 |
| Publication | Filing date | Title |
|---|---|---|
| US1162890A | System of train control. | |
| US1117278A | Throttle-valve controller. | |
| US1200048A | Train-control system. | |
| US1137811A | Train-control system. | |
| US1116647A | Air-washer. | |
| US1135374A | Mechanism for train-control systems. | |
| US1187617A | Detecting device. | |
| US1200101A | Electrical control system for locomotives. | |
| US1232442A | Safety signal system. | |
| US1217440A | Electric switch. | |
| US1232441A | Breakdown-detector for rail-joint insulation. | |
| US1204759A | Time-valve and circuit-breaker. | |
| US1138748A | Track-relay for signal systems. | |
| US1140739A | Polarized relay. | |
| US1142383A | Automatic brake-valve. | |
| US1142382A | Magnet-valve. | |
| US1115810A | Electric switch. | |
| US1274629A | Automatic signal. |