ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,561,853, issued on Feb. 24, was assigned to Xerox Corp. (Norwalk, Conn.).
"Digital (on screen) color change ink" was invented by Edward N. Chapman (Rochester, N.Y.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method, system and printing device for rendering digital color changing inks, can involve configuring a digital ink to appear as one color on a digital screen at one angle and as a different color at a different angle, and rendering the digital ink in a digital document. In an embodiment, a black geometric shape can be created, which can turn off RGB pixels. Single-color lines can be then added to the black geometric shape. The geometric shape ...