ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,438,320, issued on Oct. 7.
"Rotatable extension plugboard" was invented by Jigan Chen (Guangzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A rotatable extension plugboard relates to the technical field of electrical appliances. The rotatable extension plugboard includes a plugboard seat and a plug assembly, where a boss with an inner cavity is formed at a backplane of the plugboard seat, the plug assembly is mounted on the boss through a rotating seat provided on the plug assembly, the rotating seat and the boss form a corresponding limiting tooth and limiting groove, and the plug assembly is rotatable in a limiting manner relative to the plu...