4. Railway switches and signals
  5. Switch-connected frogs
  6. Swinging rail
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Method and system for opening and securing a railroad frog

Railway switches and signals – Switch-connected frogs – Swinging rail
Reexamination Certificate

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Rail switch

Railway switches and signals – Switch-connected frogs – Swinging rail
Patent

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Railroad frog having movable wing rails

Railway switches and signals – Switch-connected frogs – Swinging rail
Patent

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Railway switch for vignoles rails

Railway switches and signals – Switch-connected frogs – Swinging rail
Patent

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