ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,553,921, issued on Feb. 17, was assigned to 3M Innovative Properties Co. (St. Paul, Minn.).

"Sensored insulation plug" was invented by Mark Gravermann (Erkelenz, Germany), Gunther A. J. Stollwerck (Krefeld, Germany), Christine B. Bund (Wuppertal, Germany), Rainer Reeken (Dormagen, Germany), Martin A. Milek (Oberhausen, Germany) and Mirco Gunjaca (Nottuln, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "Sensored insulation plug (1) for being inserted into a separable connector in a power distribution network comprises a plug body (140) formed by a solidified insulating material (610), and a primary capacitor (150), operable as a high-voltage capac...