ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,490,820, issued on Dec. 9.
"Curling method" was invented by Mary Vitucci Tanner (Las Vegas).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of curling using a curling device comprising a flap and a channel connected to each other. A curling member having an elongated shape and a curved cross-section is implemented in the channel. The curling member is capable of transitioning between an extended configuration and a curled configuration. The channel has a curved cross-section corresponding to the curling member's curved cross-section, which creates a trough, whereby hair can be positioned in the trough and held therein by wrapping the flap over the...