US PATENT SUBCLASS 297 / 452.42
.~ Including a ventilating means

Current as of: June, 1999
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297 /   HD   CHAIRS AND SEATS

452.1  DF  BOTTOM OR BACK {12}
452.42.~ Including a ventilating means {2}
452.43  DF  .~.~> Supplemental ventilating pad {2}
452.46  DF  .~.~> Apertures in primary bottom or back {1}

DEFINITION

Classification: 297/452.42

Including a ventilating means:

(under subclass 452.1) Device wherein the back or bottom includes a means to facilitate circulation of air to provide ventilation for a seated occupant.

SEE OR SEARCH THIS CLASS, SUBCLASS:

136+, for a seat with means to transfer heat primarily to or from a seat or its occupant, or means to treat the seat as by fume, smoke, or the like. See the search notes to subclass 136 for the line with other classes.

180.1+, for a seat with means to force or propel air circulation.

SEE OR SEARCH CLASS

5, Beds,

652.1+, for a ventilated cushion and subclasses 724+ for a ventilated mattress.