US PATENT SUBCLASS 165 / DIG 439
.~.~ Serially connected conduit assemblies (i.e., no manifold)

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

DIG 355  DD  HAVING SEPARATE FLOW PASSAGE FOR TWO DISTINCT FLUIDS {7}
DIG 400  DD  .~ Shell enclosed conduit assembly {4}
DIG 439.~.~ Serially connected conduit assemblies (i.e., no manifold)