(under subclass 781) Apparatus in which the frame is specifically constructed for use in a nonpowered vehicle to be pulled by a tractor or other vehicle having self-propelling means.
(1) Note. Patents are classified in this subclass in which the type of vehicle is claimed nominally (e.g., semitrailer, boat trailer, etc.); however, patents claiming structure which accommodates a specific load or which are specific to any type of vehicle are classified with that type of vehicle. See the search notes below for semitrailers and boat trailers.
(2) Note. Patents are classified in this subclass in which a hitching means for the trailer is nominally claimed. Patents claiming vehicles and specific hitch structure are classified elsewhere in this class.
SEE OR SEARCH THIS CLASS, SUBCLASS:
423.1+, for semitrailers.
414+, for boat trailers.
491.1+, for vehicles and specific hitch structure.
