Women inventors

1. Margaret Knight, Cynthia Westover, Elizabeth Hazen and Rachel Brown, Ruth Handler

2. Amanda Jones, Mary Anderson, Bette Nesmith Graham, Dr. Ruth Benerito, Becky Schroeder

3. Catherine Greene, Madame C.J. Walker, Harriet Hosmer, Yvonne Brill, Nancy Perkins

4. Sybilla Masters, Mary Beatrice Davidson Kenner and Mildred Davidson Austin Smith, Stephanie Kwolek, Frances Gabe.