US PATENT SUBCLASS 238 / 5
.~.~ Concrete

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

2  DF  ROADBED {4}
3  DF  .~ Highway track {2}
5.~.~ Concrete

DEFINITION

Classification: 238/5

(under subclass 3) Structure that is restricted to track using concrete or plastic-compound rails or paths for the wheels.