ALEXANDRIA, Va., Feb. 19 -- United States Patent no. 12,226,027, issued on Feb. 18, was assigned to OSSTEMIMPLANT Co. LTD. (Seoul, South Korea).
"Unit chair" was invented by Sang Yong Park (Goyang-si, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to a unit chair. The unit chair includes a link unit for adjusting a posture of a headrest, wherein the link unit includes: a first link member fixed to a backrest portion of the unit chair; a second link member having one end portion hinged to the first link member by a first hinge pin; and a first ratchet member formed on one surface of at least one of the first link member and the second link member and constraining mot...