US PATENT SUBCLASS 138 / 41
.~.~ With screen


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

37  DF  WITH FLOW REGULATORS AND/OR BAFFLES {3}
40  DF  .~ Restrictors {4}
41.~.~ With screen


DEFINITION

Classification: 138/41

(under subclass 40) Pipes which have a screen in the line of flow in addition to the restrictor.