US PATENT SUBCLASS 165 / 171
.~ Means spanning side-by-side tube elements

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

168  DF  CONDUIT WITHIN, OR CONFORMING TO, PANEL OR WALL STRUCTURE {3}
171.~ Means spanning side-by-side tube elements

DEFINITION

Classification: 165/171

(under subclass 168) Apparatus comprising side by side tubes with their interspaces substantially covered by distinct interconnected structure.