US PATENT SUBCLASS 454 / 221
.~.~ Including louvers

Current as of: June, 1999
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454 /   HD   VENTILATION

196  DF  MEANS COMBINED WITH WINDOW {12}
214  DF  .~ Having air passage between sill and bottom of sash {5}
221.~.~ Including louvers

DEFINITION

Classification: 454/221

Including louvers:

(under subclass 214) Subject matter comprising generally parallel or concentric air guiding slats which lie in the air path.

SEE OR SEARCH THIS CLASS, SUBCLASS:

224, for other window ventilators including louvers.

264, for an inlet airway including structure for mixing plural air streams together which has a shaped nozzle and includes louvers.

265+, for other inlet airways including structure for mixing plural air streams together and which include louvers.

277+, for a wall-type inlet airway including a specific cover or shield for the exterior vent opening and includes louvers.

288, for a baseboard-type inlet airway which may include louvers.

290, for a floor-type inlet airway which may include louvers. 299+, for a ceiling-type inlet airway which may include louvers.

309+, for a wall-type inlet airway which includes a louvered air distributor.

325+, for an inlet airway including a specific air distributor and additionally a louver which forms an adjustable valve.

335+, for an inlet airway without a specific air distributor which includes a louver which forms an adjustable valve.

347+, for an outlet airway including an air pump which may have air regulating louvers.

358+, for other outlet airways which may have air regulating louvers.

SEE OR SEARCH CLASS

52, Static Structures (e.g., Buildings), particularly

473, for a louvered panel and subclass 633 for location of related structures in other classes.

160, Flexible or Portable Closure, Partition, or Panel,

140+, for louver devices in which the slats are flexible, or are interconnected to each other for relative movement, or may be accumulated (e.g., venetian blinds). See the Class 160 class definition.