4. Railway switches and signals
  5. Crossings, frogs, and mates
  6. Frogs
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Railroad frogs

Railway switches and signals – Crossings – frogs – and mates – Frogs
Patent

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Railroad turnout frog with continuous running surface

Railway switches and signals – Crossings – frogs – and mates – Frogs
Patent

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Railway switch heel block

Railway switches and signals – Crossings – frogs – and mates – Frogs
Patent

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Replaceable point frog

Railway switches and signals – Crossings – frogs – and mates – Frogs
Reexamination Certificate

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Reversible wing insert frog

Railway switches and signals – Crossings – frogs – and mates – Frogs
Patent

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Reversing device for movable parts within the deflection area of

Railway switches and signals – Crossings – frogs – and mates – Frogs
Patent

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