ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,778,300, issued on Nov. 3, was assigned to EMOMO TECH (ZHEJIANG) Co. LTD (Huzhou, China).

"Mechanical extending device for seat" was invented by Kai Jin (Huzhou, China), Chenkai Fu (Huzhou, China) and Yushu Zhao (Huzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "In a mechanical extending device of a seat, a seat mounting plate limiting structure, a backrest hinge shaft, and a first connection rod hinge shaft are arranged on a seat mounting plate; a leg assembly is mounted to a front of the seat mounting plate; a rear upper end of the seat mounting plate is hingedly connected to the backrest mounting rod. The backrest mounting rod, the backrest...