US PATENT SUBCLASS 238 / 228
.~.~.~ Expansible

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

151  DF  RAIL JOINTS {28}
218  DF  .~ Tread bridge {7}
227  DF  .~.~ Spacer {1}
228.~.~.~ Expansible

DEFINITION

Classification: 238/228

Elastic or expanding fillers between standard-section rail ends.