US PATENT SUBCLASS 238 / 70
.~.~ Tubular

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

29  DF  TIES {9}
54  DF  .~ Cross section {6}
70.~.~ Tubular {4}
71  DF  .~.~.~> Multiple
72  DF  .~.~.~> Rectangular {6}
80  DF  .~.~.~> Triangular
81  DF  .~.~.~> Circular

DEFINITION

Classification: 238/70

Ties formed of longitudinal tubular members.