US PATENT SUBCLASS 165 / DIG 467
.~.~ With turbulence enhancing pattern embossed on joined plates


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 464  DD  .~ Conduits formed by joined pairs of matched plates {2}
DIG 467.~.~ With turbulence enhancing pattern embossed on joined plates