Walkers to aid in mobility; Crutches and tips therefor; Walkers for use by mobility-impaired individuals; Supports for ankle for medical use; Canes for medical purposes; Walking sticks for medical purposes; 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; Patient walkers; Crutches; Walking aids for persons with disabilities in the nature of walking frames