ALEXANDRIA, Va., June 10 -- United States Patent no. 12,291,923, issued on May 6.
"Dual blind curtain provided with divided tape belt" was invented by Choon Koo Chen (Incheon, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a dual blind curtain installed at an indoor window, a wall surface, or the like and is used for purposes such as view blocking, light adjustment, heating, and indoor interior decoration effects, wherein: both opposite ends of a curtain sheet composed by connecting multiple patterns to each other are wound in roll shapes around two rotation shafts, respectively, and then curtain circulative rotation and curtain longitudinal rotation are allowed t...