ALEXANDRIA, Va., March 31 -- United States Patent no. 12,588,978, issued on March 31, was assigned to Align Technology Inc. (San Jose, Calif.).

"Devices, systems, and methods for dental arch expansion" was invented by Bruce Cam (San Jose, Calif.), Peter Webber (Redwood City, Calif.), Yuxiang Wang (Newark, Calif.), Jun Sato (San Jose, Calif.) and Jeeyoung Choi (Sunnyvale, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Devices, systems and methods for dental arch expansion. A polymeric shell including teeth receiving cavities may be shaped to impart an arch expansion force onto a first tooth of one or more teeth to move the one or more teeth from a first position a first distance from a midline of the a...