LandOfFree - US Patents - Listing for Railway switches and signals,Crossings, frogs, and mates,Frogs

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Cross frog for a set of track points, provided with an end...

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

Reexamination Certificate

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Direct support frog assembly

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

Patent

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Direct support frog assembly

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

Patent

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Frog tip that can be shifted relative to the wing rails

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

Patent

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Frog with interchangeable insert

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

Patent

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Process for producing a crossing frog with a moving point

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

Patent

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Pseudo heavy point frog assembly

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

Patent

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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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