While both Title and Practice Acts focus on the health, safety and welfare of the public, Practice Acts require that interior design services be provided by a licensed design professional. They are the most restrictive type of occupational regulation in that they prohibit unlicensed people from providing interior design services.
They ordered equipment from Europe, and on April 19, 1937, they formed Perkin-Elmer as a partnership. Perkin and Elmer started their optical design and consulting business in a small Manhattan office, but within a year they were producing optical components in Jersey City, New Jersey.
Williams renamed his eye beautifier Maybelline, in honor of his sister Mabel, who gave him the idea. In 1917 the company produced Maybelline Cake Mascara, the first modern eye cosmetic for everyday use and Ultra Lash in the 1960s, which was the first mass-market automatic. In 1967, the company was sold by Williams to Plough, Inc. (now Schering-Plough) in Memphis, Tennessee.