Madeleine Vionnet is typically credited with inventing bias cutting. It's actually untrue. Cutting on the bias had been in use long before, typically for things like ruffles, and by the start of Bias cut gown, Rose Amado, c. 1935, Goldstein Museum of Design. 1930s Fashion Styles Vintage Sewing Pattern Company Deconstructing: bias cut dresses The National Bias cut gowns are part of 1920s revival for spring cleveland.com Making 1930s Bias Cut Slips with the Woman's Institute