ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,731,866, issued on Sept. 8, was assigned to Samsung SDI Co. Ltd. (Yongin-si, South Korea).

"Secondary battery" was invented by Min Hyung Guen (Yongin-si, South Korea) and Chang Mu Lee (Yongin-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a secondary battery in which a first region and a second region of an insulation sheet are made of different materials, and thus thermal conduction between an electrode assembly and a cap plate can be blocked, light reflection that may occur during welding can be prevented, and static electricity and alignment can be maintained. Disclosed in one embodiment is a secondary...