(under subclass 287) Car-propulsion systems in which the power is pneumatic and propulsion is effected through the cooperation of the car-carried mechanism and mechanism located along the trackway and not otherwise classified below.
SEE OR SEARCH CLASS
406, Conveyors: Fluid Current, for propulsion of carriers through tubes by means of a current of air flowing through the tube. Class 104 provides for similar subject matter having tracks on which the carriers ride through the tubes.
