US PATENT SUBCLASS 238 / 189
.~.~.~ Base stiffener

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

151  DF  RAIL JOINTS {28}
187  DF  .~ Chair {3}
188  DF  .~.~ Twin {5}
189.~.~.~ Base stiffener

DEFINITION

Classification: 238/189

(under subclass 188) except that the sections under the rail-base having depending stiffening members.