US PATENT SUBCLASS 238 / 83
.~ Nonmetallic

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

29  DF  TIES {9}
83.~ Nonmetallic {1}
84  DF  .~.~> Plastic compound {2}

DEFINITION

Classification: 238/83

Ties involving nonmetallic substance in their structure.