(under subclass 51) Subject matter wherein significance is attributed to conditioning or developing a muscle employed as the user ascends or descends a set of steps or operates apparatus which imitates ascending or descending a set of steps.
SEE OR SEARCH THIS CLASS, SUBCLASS:
35+, for a play area climbing or traversing arrangement for a juvenile user.
37, for arm or hand type climbing arrangement.
SEE OR SEARCH CLASS
472, Amusement Devices, particularly
48, for an amusement walkway or passageway having a movable floor or stair step.
