US PATENT SUBCLASS 104 / 143
.~.~ Concrete

Current as of: June, 1999
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104 /   HD   RAILWAYS

140  DF  SLOTTED CONDUIT {4}
142  DF  .~ Yokes {2}
143.~.~ Concrete

DEFINITION

Classification: 104/143

(under subclass 142) Yokes or slotted conduit structure made of concrete or concrete with metal structure.