US PATENT SUBCLASS 165 / DIG 466
.~.~.~ Manifold spaces provided at one end only


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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 465  DD  .~.~ Manifold space formed in end portions of plates {1}
DIG 466.~.~.~ Manifold spaces provided at one end only