US PATENT SUBCLASS 165 / DIG 504
.~.~.~ Contoured fin surface

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

DIG 454  DD  HAVING SIDE-BY-SIDE CONDUITS STRUCTURE OR CONDUIT SECTION {16}
DIG 500  DD  .~ Side-by-side conduits with fins {2}
DIG 501  DD  .~.~ Plate fins penetrated by plural conduits {2}
DIG 504.~.~.~ Contoured fin surface