US PATENT SUBCLASS 238 / 64
.~.~.~ Rolled

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

29  DF  TIES {9}
54  DF  .~ Cross section {6}
62  DF  .~.~ Channel flange up {2}
64.~.~.~ Rolled

DEFINITION

Classification: 238/64

(under subclass 62) except that the channels are of rolled metallic sections.