US PATENT SUBCLASS 126 / 644
.~.~.~ With solid phase change

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  DF  .~.~ With heat exchanger {2}
644.~.~.~ With solid phase change

DEFINITION

Classification: 126/644

With solid phase change:

(under subclass 643) Apparatus wherein the fluent medium in the heat transferring device undergoes change in state from fluent to solid.