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Secure currency

Railways: surface track – Ties – Cross section
Reexamination Certificate

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Sleeper

Railways: surface track – Ties – Nonmetallic
Patent

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Sleeper of steel or similar material

Railways: surface track – Ties – Cross section
Patent

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Spikeless tie plate fasteners, pre-plated railroad ties and...

Railways: surface track – Ties
Reexamination Certificate

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Stacked railway tie

Railways: surface track – Ties
Reexamination Certificate

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Steel pipe connector of ladder-type sleeper for railway track

Railways: surface track – Ties – Cross section
Patent

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Steel railroad sleeper

Railways: surface track – Ties – Cross section
Patent

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Steel railroad sleepers

Railways: surface track – Ties – Cross section
Reexamination Certificate

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Steel tie insulating saddle

Railways: surface track – Ties – Insulation
Patent

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Structural members comprised of composite wood material and havi

Railways: surface track – Ties – Nonmetallic
Patent

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Structural members fabricated from waste materials and...

Railways: surface track – Ties – Nonmetallic
Reexamination Certificate

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Synthetic railroad crosstie

Railways: surface track – Ties – Nonmetallic
Patent

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Synthetic railroad tie

Railways: surface track – Ties – Nonmetallic
Patent

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