4. Railways: surface track
  5. Roadbed
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Infrastructure for railway tracks

Railways: surface track – Roadbed – Continuous
Patent

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Installation of rail tracks in roadways

Railways: surface track – Roadbed – Rail paving
Patent

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Insulated rail for electric transit systems and method of...

Railways: surface track – Roadbed – Highway track
Reexamination Certificate

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Interface strip for road/rail crossing

Railways: surface track – Roadbed – Street crossing
Patent

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