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Noise cancellation in railway cab signal

Railway switches and signals – Block-signal systems – Automatic
Patent

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Phase selective track circuit apparatus

Railway switches and signals – Block-signal systems – Automatic
Patent

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Phase-controlled track circuit receiver

Railway switches and signals – Block-signal systems – Automatic
Patent

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Plate antenna method using integral noise mitigation for railway

Railway switches and signals – Block-signal systems – Automatic
Patent

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Positive-response transit detector for a given transit zone

Railway switches and signals – Block-signal systems – Automatic
Patent

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Power transfer apparatus for railroad track circuits

Railway switches and signals – Block-signal systems – Automatic
Patent

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Process and circiuit arrangement for the transmission of digital

Railway switches and signals – Block-signal systems – Automatic
Patent

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Protective device for railroad signaling apparatus

Railway switches and signals – Block-signal systems – Automatic
Patent

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Pulse code railway signalling system

Railway switches and signals – Block-signal systems – Automatic
Patent

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Pulse code system for railroad track circuits

Railway switches and signals – Block-signal systems – Automatic
Patent

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Quad state receiver

Railway switches and signals – Block-signal systems – Automatic
Patent

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Railroad crossing motion sensing system

Railway switches and signals – Block-signal systems – Automatic
Patent

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Railroad interlocking signal system with insulated joint failure

Railway switches and signals – Block-signal systems – Automatic
Patent

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Railroad motion detecting and signalling system with repeater re

Railway switches and signals – Block-signal systems – Automatic
Patent

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Railroad traffic control signaling system

Railway switches and signals – Block-signal systems – Automatic
Patent

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Railway cab signal

Railway switches and signals – Block-signal systems – Automatic
Patent

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Railway cab signal transmitter

Railway switches and signals – Block-signal systems – Automatic
Patent

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Railway code following apparatus

Railway switches and signals – Block-signal systems – Automatic
Reexamination Certificate

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Railway signal system

Railway switches and signals – Block-signal systems – Automatic
Patent

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Railway signalling system

Railway switches and signals – Block-signal systems – Automatic
Patent

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