LandOfFree - US Patents - Listing for Railway switches and signals,Switch-connected frogs

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Rail switch

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

Patent

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Railroad crossing apparatus having improved rail connection...

Railway switches and signals – Switch-connected frogs

Reexamination Certificate

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Railroad frog assembly with latch holdback

Railway switches and signals – Switch-connected frogs

Patent

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Railroad frog assembly with multi-position holdback

Railway switches and signals – Switch-connected frogs

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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Railroad spring wing frog with hold-open and shock dampening...

Railway switches and signals – Switch-connected frogs

Reexamination Certificate

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Railway frog system

Railway switches and signals – Switch-connected frogs – Overlapped main

Patent

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Railway switch comprising a frog having a movable main point and

Railway switches and signals – Switch-connected frogs

Patent

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Railway switch for Vignoles rails

Railway switches and signals – Switch-connected frogs – End-pivoted 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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Reversing device for movable parts of a railway switch

Railway switches and signals – Switch-connected frogs

Patent

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Reversing device for swivelable rails or movable frogs within th

Railway switches and signals – Switch-connected frogs

Patent

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