ALEXANDRIA, Va., March 5 -- United States Patent no. 12,239,589, issued on March 4, was assigned to Stryker Corp. (Portage, Mich.).

"Mattress cover and mattress assembly" was invented by James K. Galer (Byron Center, Mich.), Carrie Klain (St. Charles, Ill.), Patrick Lafleche (Kalamazoo, Mich.), Justin Raymond (Jackson, Mich.), Kevin M. Patmore (Plainwell, Mich.), Alexey Titov (Redmond, Wash.), Henry Kuhnen (Mount Pleasant, S.C.) and Ming Chen (Ann Arbor, Mich.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A mattress cover for a mattress providing movement therapy to a patient. A patient support portion covers the upper surface of the mattress, and a bottom portion is coupled to the patient support portion. ...