4. Railway switches and signals
  5. Block-signal systems
  6. Automatic

Christopher S. Detka

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Apparatus and method for detecting a bridged tap and/or an...

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Testing of subscriber loop or terminal
Reexamination Certificate

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Cab signaling apparatus and method

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

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Profile ID: LFUS-PAI-P-549716

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