The idea came from a pot roast. The rods that held the meat became, in Marjorie Stewart Joyner’s mind, a machine with 16 rods that could wave hair from the inside — and on November 27, 1928, the United States patented it. Then the fine print took everything: the company owned her invention, and she never made a dime from it.
Joyner’s permanent-wave machine, U.S. Patent 1,693,515, was a genuine leap for the beauty industry — a way to wave hair more efficiently than the slow, single-curl methods stylists had been stuck with. She said the idea came from the rods used in pot roast, which tells you everything about how inventors actually work: they look at an ordinary kitchen object and see the machine nobody else saw.
The National Archives describes her as among the first African American women to receive a U.S. patent — and this page prints it that careful way, because her record doesn’t need inflation. She was a Black woman with a patented machine in 1928, in an industry and an era stacked against her on both counts.
The part that stings
Here is the injustice inside the triumph. Joyner worked for Madam C.J. Walker’s company — she was its national supervisor, overseeing 200 beauty schools and teaching some 15,000 stylists. But because she invented the machine as a company woman, the Walker company owned the rights to it. The patent that could have made her wealthy made her employer wealthy instead. She never profited from her own invention.
Sit with that alongside the numbers she did build: 200 beauty schools supervised. Some 15,000 stylists taught. Whatever the company kept from the patent, it could not keep the women she trained — thousands of stylists carrying her standards and her techniques into salons across the country.
She kept building anyway
And she did not stop at the salon chair. In 1945, Joyner co-founded the United Beauty School Owners and Teachers Association — organizing the very people who owned and taught in beauty schools, the infrastructure of the industry itself.
That is the full portrait: an inventor whose invention was taken by contract, who responded by spending her life building the profession — its schools, its standards, its associations. The dime she never made is a scandal. The 15,000 stylists are a legacy. Both are true, and this page tells both.
The pot roast detail deserves one more beat, because it captures how invention actually happens in working people’s hands. Joyner wasn’t in a laboratory. She was a working stylist who cooked her own meals, and she looked at an object from her kitchen and saw its logic hiding inside a beauty problem — rods that could wave hair from the inside. Sixteen of them. That leap, from the stove to the patent office, is the signature of a mind that treated her own trade as engineering decades before the industry would have dreamed of calling a Black stylist one.
Join the conversation
Have you ever created something at a job that the company got to keep? And be honest: did you know the permanent wave machine came from a Black woman’s pot roast inspiration in 1928? Tell us below.
Source note: Marjorie Stewart Joyner’s permanent-wave machine — U.S. Patent 1,693,515, received November 27, 1928, with 16 rods that waved hair from the inside, an idea she said came from the rods used in pot roast — and her role as Madam C.J. Walker’s national supervisor overseeing 200 beauty schools and teaching some 15,000 stylists, with the Walker company owning the rights so she never profited from the invention, are from the Smithsonian National Museum of American History’s patent record and the National Archives, which describes her as “among the first African American women to receive a patent.” Her co-founding of the United Beauty School Owners and Teachers Association in 1945 is from the same record.
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