ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,433,412, issued on Oct. 7.
"Retractable footrest for chair" was invented by Chang-Chen Lin (Tainan, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A chair comprises a base, a seat, a backrest, an operating unit, and a footrest. A first shaft is pivotably connected to a rear end of the seat. The operating unit includes a transmission member, a spring, and a first motor. An end of the transmission member is connected to the seat. An end of the spring is connected to another end of the transmission member. Another end of the spring is connected to the seat. The first motor has an end connected to the seat. The footrest is pivotably connected to a fro...