Crutches; Rollators; Adjustable sit-to-stand assistive device for use by mobility-impaired individuals comprised of dual support handles and a frame that fits underneath chair cushions; Crutches and tips therefor; Fitted covers for underarm crutch pads; Medical walkers; Patient walkers; Quad canes for medical purposes; Walkers for use by mobility-impaired individuals; Walkers to aid in mobility; Walking aids for disabled persons, namely, walking frames; Walking aids for medical purposes; Walk...