Joyner submitted her petition and drawings to the U.S. Patent Office for her permanent wave machine.
On May 16, 1928, Marjorie Joyner submitted her patent application for a pioneering permanent wave machine, an invention designed to curl or straighten hair more efficiently using multiple heated rods. This technology was a significant leap forward in cosmetology, enabling safer and more consistent hair treatments. Joyner's invention not only revolutionized salon services but also underscored her role as an African American woman breaking into fields traditionally dominated by men.