ALEXANDRIA, Va., July 3 -- United States Patent no. 12,344,778, issued on July 1, was assigned to TOYOBO Co. LTD. (Osaka, Japan).

"Polyester film and use thereof" was invented by Mei Matsumura (Tsuruga, Japan), Shotaro Nishio (Tsuruga, Japan) and Kiwamu Kawai (Tsuruga, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "Problem: An object of the present invention is to provide a polyester film for a foldable display, the film having a hold angle in a bending direction of 155deg or more and a maximum heat shrinkage at 150deg C. of 1.5% or less (wherein the hold angle refers to an angle of a crease after fixing the film at room temperature for 72 hours in such a manner that a strain of 1.7% is applied to both...