US PATENT SUBCLASS 119 / 448
.~.~ Building heating or forced air ventilation

Current as of: June, 1999
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119 /   HD   ANIMAL HUSBANDRY

416  DF  CONFINING OR HOUSING {11}
436  DF  .~ Permanent building (e.g., barn, stable, hog house, poultry house, etc.) {5}
448.~.~ Building heating or forced air ventilation

DEFINITION

Classification: 119/448

With heating or forced air ventilation:

(under subclass 436) Subject matter including structure and apparatus for raising the environmental temperature or providing a driven circulation of air within the building.

SEE OR SEARCH CLASS

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

198+, for roof or cover over usable space including a fluid guiding port.

454, Ventilation, appropriate subclasses for a ventilating structure with air directing or controlling feature.