ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,496,690, issued on Dec. 16.
"Engaging structure for hand tool" was invented by Chien-Ying Lee (Taichung, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An engaging structure for a hand tool includes a main body provided with a mounting element, six drive portions, six receiving portions, two first arcuate faces, a second arcuate face, a first radius, a second radius, a first distance, and a second distance. Each of the six receiving portions has an arcuate concave shape and is arranged between one of the two first arcuate faces of one of the six drive portions and one of the two first arcuate faces of another one of the six drive portions. Each o...