US PATENT SUBCLASS 392 / 369
.~.~.~.~.~ Counterflow

Current as of: June, 1999
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392 /   HD   ELECTRIC RESISTANCE HEATING DEVICES

*  DD  HEATING DEVICES (CLASS 219 SUBCLASS 200) {11}
347  DF  .~ Convection space heater {10}
360  DF  .~.~ Forced air type {5}
365  DF  .~.~.~ Portable {3}
368  DF  .~.~.~.~ With baffle {1}
369.~.~.~.~.~ Counterflow

DEFINITION

Classification: 392/369

Counterflow:

(under subclass 368) Subject matter wherein the baffle causes an airflow through the housing to reverse its direction of flow at least once when inflowing from an inlet to an outlet.