ALEXANDRIA, Va., March 31 -- United States Patent no. 12,589,599, issued on March 31, was assigned to XEROX Corp. (Norwalk, Conn.).

"Diagnostic sheet and detection method for inkjet prints using paper precoat solutions" was invented by Varun Sambhy (Pittsford, N.Y.), Mark C. Petropoulos Jr. (Webster, N.Y.), Peter M. Gulvin (Webster, N.Y.), Anthony S. Condello (Webster, N.Y.), Seemit Praharaj (Webster, N.Y.), Douglas K. Herrmann (Webster, N.Y.), Christine A. Steurrys (Williamson, N.Y.), Jason M. LeFevre (Penfield, N.Y.), Palghat S. Ramesh (Pittsford, N.Y.), Jorge A. Alvarez (Webster, N.Y.) and Brian Lindstrom (Victor, N.Y.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A diagnostic system for measuring inkjet...