US PATENT SUBCLASS 238 / 117
.~.~ Bar core

Current as of: June, 1999
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238 /   HD   RAILWAYS: SURFACE TRACK

109  DF  PEDESTALS {7}
115  DF  .~ Concrete block {2}
117.~.~ Bar core

DEFINITION

Classification: 238/117

The concrete blocks are connected transversely of the rails by bars, which latter pass centrally through the concrete blocks.