US PATENT SUBCLASS 165 / DIG 329
.~.~ Corrugated fin attached to heat transfer surface

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

DIG 327  DD  THERMOSYPHONIC HAVING VERTICAL AIR DRAFT PASSAGE {3}
DIG 328  DD  .~ Air draft passage confined entirely or in part by fin structure {2}
DIG 329.~.~ Corrugated fin attached to heat transfer surface