US PATENT SUBCLASS 165 / DIG 316
.~.~ Axial impeller located at heat-exchange housing inlet
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 316
.~.~ Axial impeller located at heat-exchange housing inlet