Assistive walking devices for medical purposes; crutches; canes for medical purposes; walking sticks for medical purposes; rollators; sit to stand devices for assisting mobility impaired persons comprised of a frame for positioning around a chair; medical assistive devices, namely, portable furniture frames with arms to assist disabled persons in getting up and down from chairs or other furniture; mobility aids, namely, self-propelled adaptive devices to facilitate walking, movement and exercise for mobility impaired persons; mobility assistive devices, namely, walkers to navigate narrow spaces