Sassoon's works include the geometric perm and the "Nancy Kwan" hairstyles. They were all modern and low-maintenance. The hairstyles created by Sassoon relied on dark, straight, and shiny hair cut into geometric yet organic shapes. In 1964, Sassoon created a short, angular hairstyle cut on a horizontal plane that was the recreation of the classic "bob cut." His geometric haircuts seemed to be severely cut, but were entirely lacquer-free, relying on the natural shine of the hair for effect. Advertising and cosmetics executive Natalie Donay is credited with discovering Sassoon in London and bringing him to the United States, where in 1965 he opened his first New York City salon on Madison Avenue. In 1966, inspired by 1920s film star Clara Bow's close cropped hair, he created designs for Emanuel Ungaro. Director Roman Polanski brought him to Hollywood from London in 1968, at a cost of $5,000 (), to create a unique pixie cut for Mia Farrow, who was to star in Rosemary's Baby. In the early 1970s Sassoon made Los Angeles his home. In 1971 he promoted his 30-year-old second-in-command, artistic director Roger Thompson, to director of the Sassoon salon, explaining jocularly that, "Twenty-five years of schlepping behind a barber chair are enough!" John Paul DeJoria, a friend of Sassoon, co-founded Paul Mitchell Systems with Paul Mitchell, one of Sassoon's former students. Mitchell said that Sassoon was "the most famous hairstylist in the history of the world." Sassoon began his "Vidal Sassoon" line of hair-care products in 1973. The actor Michael Caine, who when young and struggling "was roommates with Terence Stamp and Vidal Sassoon – he used to cut my hair, and he always had a lot of models around", claimed to have inspired this, saying, "I told him that he must have something that is working for him while he slept. I told him he had to make shampoos and other hair-care products." Whatever the inspiration, Sassoon's brand was applied to shampoos and conditioners sold worldwide, with a commercial campaign featuring the slogan "If you don't look good, we don't look good." Former salon colleagues also bought Sassoon's salons and acquired the right to use his name, extending the brand in salons into the United Kingdom and the United States. The El Paso, Texas-based Helen of Troy Corporation began manufacturing and marketing Sassoon hair-care products in 1980. In 1983, Richardson-Vicks purchased the Los Angeles-based Vidal Sassoon Inc.