US PATENT SUBCLASS 165 / DIG 306
.~.~.~.~ Located at heat-exchange housing outlet

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

DIG 228  DD  WITH FAN OR PUMP {3}
DIG 302  DD  .~ Rotary gas pump {7}
DIG 303  DD  .~.~ Annular heat exchanger {1}
DIG 304  DD  .~.~.~ Axial impeller {2}
DIG 306.~.~.~.~ Located at heat-exchange housing outlet