NATIONAL RAILROAD PASSENGER CORPORATION
24Patents
9Active
24Granted
41Portfolio score
Filing activity: Mar 16, 1978 → Jun 10, 2020 · 2 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6064428A | Automated track inspection vehicle and method | Performing Operations; Transporting | 116 | Expired |
| US6052884A | Conveyorized system for rebuilding tread and disc brake actuator units for use in railway cars | Emerging Cross-Sectional Technologies | 86 | Expired |
| US6356299B1 | Automated track inspection vehicle and method | Performing Operations; Transporting | 64 | Expired |
| US6345257B1 | Computer based interactive defect reporting system for the paperless reporting of problems in a vehicle forming part of a fleet | Physics | 20 | Expired |
| US4135533A | Vehicle cleaning system | Performing Operations; Transporting | 20 | Expired |
| US5936153A | Apparatus and method for testing brake actuator units used in railroad cars | Physics | 10 | Expired |
| US5963631A | Wayside communications safety system | Electricity | 10 | Expired |
| US6386492B1 | Temporary sign holder | Physics | 9 | Expired |
| US5956228A | Electrical equipment case | Electricity | 8 | Expired |
| US9932045B2 | Loading platform that mitigates gap for passengers | Performing Operations; Transporting | 8 | Active |
| US6115237A | Electrical equipment case | Electricity | 7 | Expired |
| US6672516B1 | Thick web miter rail joint system between stationary and vertically movable track sections | Fixed Constructions | 5 | Expired |
| US6901381B2 | Method for rolling salable inventory control and system therefor | Physics | 5 | Expired |
| US4365333A | Test signal generator | Performing Operations; Transporting | 4 | Expired |
| US6592081B2 | Electronic code generating circuit for use in railroad signaling systems | Performing Operations; Transporting | 3 | Expired |
| US8196469B2 | Multi-probe rail scanning/encoder system and certified method of use thereof | Physics | 2 | Active |
| US4649971A | Crosstie boring apparatus | Emerging Cross-Sectional Technologies | 1 | Expired |
| US9347183B2 | Tie extension bracket | Fixed Constructions | 1 | Active |
| US9802625B2 | Method and system for drive for setback platform system | Performing Operations; Transporting | 1 | Active |
| US11873017B2 | Transportation operations devices and methods | Performing Operations; Transporting | 0 | Active |
| USD755078S1 | Bridge plate | General | 0 | Active |
| US9128034B2 | Multi-probe rail scanning/encoder system and certified method of use thereof | Physics | 0 | Active |
| US11034365B2 | Method and system for setback modular platform with integrated shuttle platform | Performing Operations; Transporting | 0 | Active |
| US10384691B2 | Method and system for setback modular platform with integrated shuttle platform | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.