ALEXANDRIA, Va., Sept. 15 -- United States Patent no. 12,734,647, issued on Sept. 15.

"Switch-positioning device of a ratchet wrench" was invented by Yi-Min Li (Taichung City, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A ratchet wrench includes a head, a toothed wheel, a pawl and a switch. The head includes two bores in communication with a pothole in communication with a chamber via a channel. The channel includes a broad section between two tapered sections. The toothed wheel is rotatable in the chamber. The switch is pivotable in the pothole and includes a tunnel with a first end in communication with the broad section of the channel and a second end in communication with the pothole. A spring ...