Electrically operated railroad switch machine
Electromagnetic identification system
Electromagnetic signalling system
Electronic identification system
Electronic railroad track marker system
Electronic scanner
Electronic track current switching relay system
Electronically controlled grade crossing gate system and method
End position detector for movable switch parts
Energy absorbing impact barrier
Equipment for maintaining the spacing of track-bound vehicles
Equipment for transporting a load
Extensible railroad grade crossing gate arm
Facility for monitoring the operation of a signal lamp
Fail-safe decoder for digital track circuits
Fail-safe logic circuitry for vehicle transportation control
Fail-safe railroad-highway grade crossing protection system
Fail-safe solid state highway crossing protection apparatus
Fail-safe speed control system for railroad trains
Failsafe cab signal process for high voltage pulsating...