US PATENT SUBCLASS 138 / 116
.~.~ Distinct

Current as of: June, 1999
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138 /   HD   PIPES AND TUBULAR CONDUITS

111  DF  PLURAL DUCT {4}
115  DF  .~ Longitudinally extending common wall {2}
116.~.~ Distinct

DEFINITION

Classification: 138/116

(under subclass 115) Device wherein the element is separable from the duct.