US PATENT SUBCLASS 165 / DIG 131
.~.~ Single-confined-fluid radiator for heating ambient air

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

DIG 92  DD  WITH VALVE OR MOVABLE DEFLECTOR FOR HEAT EXCHANGE FLUID FLOW {6}
DIG 126  DD  .~ Total flow rate through heat exchanger controlled by valve {3}
DIG 131.~.~ Single-confined-fluid radiator for heating ambient air