US PATENT SUBCLASS 454 / 140
.~.~ Forced recirculation alone or agitating fan
Current as of:
June, 1999
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454 /
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VENTILATION
69
DF
VEHICLE (E.G., AUTOMOBILE, ETC.)
{15}
139
DF
.~ Having forced recirculation {1}
140
.~.~ Forced recirculation alone or agitating fan
DEFINITION
Classification: 454/140
Forced recirculation alone or agitating fan:
(under subclass 139) Subject matter wherein the air moving apparatus contacts and directly moves only existing air within the ventilated space.
(1) Note. Subject matter including means for also introducing air from outside of the ventilated space into the space is excluded from this subclass.
SEE OR SEARCH THIS CLASS, SUBCLASS:
100+, for a railcar, bus, or trailer having forced recirculation of vehicle air alone.
230+, for a static structure (e.g., building) having forced recirculation of ventilating air alone.
