ALEXANDRIA, Va., March 26 -- United States Patent no. 12,259,880, issued on March 25, was assigned to Oracle International Corp. (Redwood Shores, Calif.).

"Visualization tool for building nested queries" was invented by Prashant Singh (Lexington, Mass.), Rasika Vaidya Kaura (Dublin, Calif.) and Henrik Michael Ammer (Auburn, Wash.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Techniques for generating an interactive visualization tool for building nested queries are disclosed. The interactive nested query visualization tool allows a user to observe, analyze, and modify query characteristics and attributes of a set of nested queries. A system displays an interactive visual depiction of a set of nested queries...