US PATENT SUBCLASS 454 / 241
.~ Including unitary inlet and outlet housing

Current as of: June, 1999
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454 /   HD   VENTILATION

237  DF  HAVING BOTH INLET AND OUTLET AIRWAYS {6}
241.~ Including unitary inlet and outlet housing {4}
242  DF  .~.~> Rooftop
243  DF  .~.~> Sleeved vent for ceiling, wall, or floor (e.g., thimble) {1}
245  DF  .~.~> Air distributor with return vent (e.g., register, etc.) {3}
249  DF  .~.~> With air pump

DEFINITION

Classification: 454/241

Including unitary inlet and outlet housing:

(under subclass 237) Subject matter comprising a single structure containing portions of the air admitting and air exhausting means.

(1) Note. This and indented subclasses are intended to include subject matter in which the air admitting and air exhausting means are integral.

SEE OR SEARCH THIS CLASS, SUBCLASS:

104, for railcars, buses, or trailers which have a unitary inlet and outlet housing.

142, for other vehicles which have a unitary inlet and outlet housing.

234+, for static structures having forced recirculation and which use a unitary inlet and outlet housing.