US PATENT SUBCLASS 237 / 12.7
.~.~.~ Radiator

Current as of: June, 1999
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237 /   HD   HEATING SYSTEMS

12.1  DF  HEAT AND POWER PLANTS {3}
12.4  DF  .~ Car {3}
12.6  DF  .~.~ Air {1}
12.7.~.~.~ Radiator

DEFINITION

Classification: 237/12.7

(under subclass 12.6) Heating systems in which the warm air is passed through radiators.