(under subclass 117) Structure particularly designed to improve the convenience or efficiency with which passengers or flight personnel are carried.
SEE OR SEARCH THIS CLASS, SUBCLASS:
137.2, for a device or arrangement designed to permit aircraft passengers to be taken on board or discharged, that subclass (137.2) being the applicable locus regardless of the presence of the passenger-carrying features also, and frequently necessarily likewise involved, which latter feature is subject matter for the instant and superior subclasses (118.5+).
SEE OR SEARCH CLASS
62, Refrigeration,
239+, for a refrigeration system with such a vehicle feature as the cooling of the occupant space.
