ALEXANDRIA, Va., March 17 -- United States Patent no. 12,576,625, issued on March 17, was assigned to Covestro Deutschland AG (Leverkusen, Germany).

"Layer structure for producing a hinge, in particular for producing multi-layered book covers" was invented by Georgios Tziovaras (Neuss, Germany), Heinz Pudleiner (Krefeld, Germany), Deivaraj Theivanayagam Chairman (Dusseldorf, Germany), Helge Kosthorst (Visselhovede, Germany), Christoph Koehler (Duisburg, Germany), Norbert Hermanns (Krefeld, Germany), Kira Planken (Goch, Germany) and Stefan Janke (Bruggen, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a layer structure, preferably a hinge, particularly preferably a boo...