ALEXANDRIA, Va., March 26 -- United States Patent no. 12,257,672, issued on March 25, was assigned to INFAR INDUSTRIAL Co. LTD. (Chang-Hua County, Taiwan).
"Locking device for tool" was invented by Tai Hung Chen (Chang-Hua County, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A locking device for a tool includes a first component and a second component. The first component has a through hole, and an inner wall of the through hole is provided with a first engaging portion. The second component is selectively rotatably connected to the through hole and provided with a second engaging portion detachably engaged with the first engaging portion. The second component can move relative to the through hole t...