4. Railway switches and signals
  5. Block-signal systems
  6. Semi-automatic
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Apparatus for improved block control of train operation

Railway switches and signals – Block-signal systems – Semi-automatic
Patent

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Guard for animal transporting vehicles

Railway switches and signals – Block-signal systems – Semi-automatic
Patent

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Manual block traffic control and signaling system for railroads

Railway switches and signals – Block-signal systems – Semi-automatic
Patent

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