US PATENT SUBCLASS 126 / 643
.~.~ With heat exchanger

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

569  DF  SOLAR HEAT COLLECTOR {18}
634  DF  .~ With means to convey fluent medium through collector {7}
643.~.~ With heat exchanger {2}
644  DF  .~.~.~> With solid phase change
645  DF  .~.~.~> With liquid phase change

DEFINITION

Classification: 126/643

With heat exchanger:

(under subclass 634) Apparatus which includes a device that transfers heat from one fluent medium to another fluent without mixture of the fluents. [figure]