ALEXANDRIA, Va., June 5 -- United States Patent no. 12,274,559, issued on April 15, was assigned to KPR U.S. LLC (Mansfield, Mass.).

"Control unit for monitoring patient compliance with a compression therapy regimen" was invented by Kristin L. Watson (Lithia, Fla.) and Mark A. Vess (Hanson, Mass.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Monitoring patient compliance with a compression therapy regimen. Venous Refill Time (VRT) is monitored via a pressure sensor in a bladder of a compression system. A controller of the compression system correlates the monitored VRT to a predetermined threshold to determine whether the patient is using the compression system."

The patent was filed on Sept. 23, 2022, und...