medical, rehabilitative, therapeutic and physical therapy devices related to human injury or mobility, namely, gait trainers, support devices related to human development, injury or mobility in the nature of a ground-engaging support structure which can provide support at the human pelvic region so as to facilitate orienting the human in a substantially erect position; wheeled human ambulatory devices in the nature of a wheeled support structure in which a human can be supported at the human pelvic region to permit the human being to ambulate; fall protection devices for humans in the nature of a ground-engaging structure by which a human can be supported so as to prevent the human from falling and contacting the ground surface when the human loses balance control or weight-bearing ability; hands-free walkers; and active/passive standing support devices for humans