(under subclass 190.08) Subject matter wherein a portion of the cab structure is associated with the treatment of a cab atmosphere such as heating or cooling or ventilating the air within the cab.
SEE OR SEARCH THIS CLASS, SUBCLASS:
208, for vehicle ducts or conduits to transport the air.
SEE OR SEARCH CLASS
454, Ventilation,
69+, for a vehicle (e.g., automobile, etc.) ventilation.