US PATENT SUBCLASS 165 / DIG 518
.~ Conduit with discrete fin structure


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

DIG 510  DD  HAVING HEAT EXCHANGE SURFACE TREATMENT, ADJUNCT OR ENHANCEMENT {7}
DIG 518.~ Conduit with discrete fin structure {5}
DIG 519  DD  .~.~> porous or mesh
DIG 520  DD  .~.~> Internal and external {1}
DIG 522  DD  .~.~> Transverse fins spaced along conduit {1}
DIG 524  DD  .~.~> Longitudinally extending {2}
DIG 528  DD  .~.~> Fin and conduit of diverse materials