US PATENT SUBCLASS 126 / 611
.~.~ In a heat exchanger

Current as of: June, 1999
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126 /   HD   STOVES AND FURNACES

569  DF  SOLAR HEAT COLLECTOR {18}
609  DF  .~ With auxiliary heat source for fluent medium {7}
611.~.~ In a heat exchanger

DEFINITION

Classification: 126/611

In a heat exchanger:

(under subclass 609) Apparatus wherein the heater is located within a device that transfers heat from one fluid to another without mixture of the fluids.