US PATENT SUBCLASS 238 / 206
.~.~.~ Base filler

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

151  DF  RAIL JOINTS {28}
187  DF  .~ Chair {3}
205  DF  .~.~ Integral {3}
206.~.~.~ Base filler

DEFINITION

Classification: 238/206

(under subclass 205) with the addition of a base-plate filler inserted between the rail bottom and the joint-base.