US PATENT SUBCLASS 454 / 144
.~.~ Including duct extending along floor

Current as of: June, 1999
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454 /   HD   VENTILATION

69  DF  VEHICLE (E.G., AUTOMOBILE, ETC.) {15}
143  DF  .~ Having inlet airway {7}
144.~.~ Including duct extending along floor

DEFINITION

Classification: 454/144

Including duct extending along floor:

(under subclass 143) Subject matter comprising an air carrying conduit stretching parallel to and within or adjacent a lower, supporting surface of the ventilated space

(i.e., floor).

(1) Note. An air carrying conduit which merely passes perpendicularly through the supporting surface is not included in this subclass.