US PATENT SUBCLASS 165 / DIG 437
.~.~.~.~ Coiled


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 427  DD  .~.~ Manifold for tube-side fluid (i.e., parallel) {5}
DIG 436  DD  .~.~.~ Bent conduit assemblies {1}
DIG 437.~.~.~.~ Coiled {1}
DIG 438  DD  .~.~.~.~.~> Helical