ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,528,267, issued on Jan. 20, was assigned to DONGSUNG CHEMICAL Co. LTD. (Busan, South Korea).
"Sheet having closed cell layer" was invented by Sumi Park (Busan, South Korea) and Keunmo Kim (Busan, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a sheet having a closed cell layer and, in particular, to an eco-friendly sheet including a plurality of closed cells formed on an eco-friendly resin film, and a print portion on which a predetermined image is printed. The sheet according to the present invention may be prevented from deforming or breaking even from external shocks or severe external environmental condit...