As far as possible, an invention is classified primarily according to constructional features; classification according to particular kinds of aircraft is normally regarded as being of secondary importance, except in cases where this is understood to be the characteristic feature.
In this sub-class, the term "installations" embraces equipment, including mobile equipment, peculiar to use in connection with aircraft and not fitted thereto.
The term "ground installations" in this sub-class embraces waterborne installations.
In this sub-class, the term "cosmonautics" includes all transport outside the earth's atmosphere, and thus includes artificial earth satellites, and interplanetary and interstellar travel.
This sub-class deals only with vehicles, equipment, etc., which are peculiarly adapted for cosmonautics. Thus, vehicles and equipment applicable to both cosmonautics and aeronautics are classified in the appropriate aeronautical sub-class of class Fulltext... Hierarchy... Expanded...B64.