US PATENT SUBCLASS 238 / 239
.~.~.~.~ Twin

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

151  DF  RAIL JOINTS {28}
230  DF  .~ Scarf {5}
236  DF  .~.~ Laterally assembled {2}
238  DF  .~.~.~ Longitudinal lock {1}
239.~.~.~.~ Twin

DEFINITION

Classification: 238/239

(under subclass 238) except that the specially-formed rail ends are duplicates.