US PATENT SUBCLASS 454 / 191
.~ Including suction outlet

Current as of: June, 1999
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454 /   HD   VENTILATION

188  DF  HAVING PROTECTING AIR CURRENT {5}
191.~ Including suction outlet

DEFINITION

Classification: 454/191

Including suction outlet:

(under subclass 188) Subject matter comprising a passageway for attracting and exhausting the jet or sheet of air after it has passed across the opening.