US PATENT SUBCLASS 238 / 32
.~.~.~ Hinged


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

29  DF  TIES {9}
30  DF  .~ Forms {12}
31  DF  .~.~ Jointed {2}
32.~.~.~ Hinged


DEFINITION

Classification: 238/32

(under subclass 31) except that the joints are flexible or hinged.