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"The Americans have need of the telephone, but we do not. We have plenty of messenger boys."
Sir William Preece, chief engineer, British Post Office ; 1878
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| Number | Title | Issue Date |
| 7714886 | Systems and methods for obtaining improved accuracy measurements of moving rolling stock components Reference markers are attached to rails and/or other dynamically moving components of railroad tracks, and/or located at fixed and stationary positions adjacent to the track. When images of railway rolling stock are obtained, the reference marker(s) appear in the im... | 05/11/2010 |
| 7681443 | Apparatus for detecting hunting and angle of attack of a rail vehicle wheelset An apparatus and method for estimating the angle of attack of wheels, wheelsets, trucks and railway vehicles traveling over a track employing a wayside system having a plurality of sensors, adjacent to the rails of the track, for detecting the passing of each wheels... | 03/23/2010 |
| 7278305 | Apparatus for detecting hunting and angle of attack of a rail vehicle wheelset An apparatus and method for estimating the angle of attack of wheels, wheelsets, trucks and railway vehicles traveling over a track employing a wayside system having a plurality of sensors, adjacent to the rails of the track, for detecting the passing of each wheels... | 10/09/2007 |
