US PATENT SUBCLASS 454 / 186
.~ Having blower

Current as of: June, 1999
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454 /   HD   VENTILATION

185  DF  HOLLOW PARTITION {1}
186.~ Having blower

DEFINITION

Classification: 454/186

Having blower:

(under subclass 185) Subject matter wherein the ventilating air movement is forced by means such as a fan, air pump, etc.