US PATENT SUBCLASS 238 / 85
.~.~.~ Internal reinforcements

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

29  DF  TIES {9}
83  DF  .~ Nonmetallic {1}
84  DF  .~.~ Plastic compound {2}
85.~.~.~ Internal reinforcements {8}
86  DF  .~.~.~.~> Truss
87  DF  .~.~.~.~> Tube
88  DF  .~.~.~.~> Cast
89  DF  .~.~.~.~> Rolled section
90  DF  .~.~.~.~> Closed loop
91  DF  .~.~.~.~> Rods {1}
93  DF  .~.~.~.~> Foraminous sheet
94  DF  .~.~.~.~> Wire

DEFINITION

Classification: 238/85

Metallic or wooden stiffening members embedded in the interior of plastic-compound ties to strengthen the same.