US Patent Issued to TOPPAN on Oct. 14 for "Color display, authentication medium, and method for determining authenticity of color display" (Japanese Inventor)

ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,443,812, issued on Oct. 14, was assigned to TOPPAN INC. (Tokyo).

"Color display, authentication medium, and method for determining authenticity of color display" was invented by Keitaro Sugihara (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A color display of an embodiment includes: an embossed layer; a high refractive index layer; and a protective layer, laminated in this order, wherein the high refractive index layer has a highest refractive index among these layers, the embossed layer includes a first region having a periodic structure with a period at least smaller than a center wavelength of visible light, a plurality of the first regions, ...