US PATENT SUBCLASS 165 / 163
.~ Conduit coiled within casing

Current as of: June, 1999
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165 /   HD   HEAT EXCHANGE

157  DF  CASING OR TANK ENCLOSED CONDUIT ASSEMBLY {4}
163.~ Conduit coiled within casing

DEFINITION

Classification: 165/163

(under subclass 157) Apparatus including a continuous conduit which is coiled, looped or bent within the casing stream.