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| Number | Title | Issue Date |
| 5353987 | Railroad track system having vertically adjustable railroad tie and method of construction therefor A railroad track has a roadbed made of concrete and a pair of track beams of precast concrete mounted to the roadbed. Main bodies of the track beams have at the tops thereof a plurality of protrusions serving as ties and a plurality of recesses for receiv... | 10/11/1994 |
| 4130244 | Track rail support A track rail support includes ties positioned at spaced intervals along a base and supporting track rails. An elongated intermediate carrier is positioned between the ties and each track rail. Secondary track rail supports in the form of block-shaped elem... | 12/19/1978 |
