ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,482,979, issued on Nov. 25, was assigned to Min Li (Changshu, China).
"Set of safety plugs and safety socket" was invented by Min Li (Changshu, China), Qian Li (Changshu, China) and Wen Li (Changshu, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A set of safety plugs and safety socket includes a two-pin plug, a three-pin plug, and a safety socket. The two-pin plug includes two two-pin plug outer plug bodies movably connected with each other. A two-pin plug self-locking column is movably connected with the two-pin plug outer plug bodies. A two-pin plug self-locking column sling groove and a hole accommodating a fastening nut are defined in the two...