ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,533,774, issued on Jan. 27.
"Engaging structure for hand tool" was invented by Tsan-Chang 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. The main body has a mounting element. The mounting element includes multiple first recessed portions, multiple second recessed portions, and multiple locking sides. Each of the first recessed portions is provided with two grooves. Each of the second recessed portions is provided with a first curved face. Each of the locking sides has a planar shape. Each of the locking sides is arranged between two of the second recessed portions. Each of...