ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,553,624, issued on Feb. 17, was assigned to BISSELL Inc. (Grand Rapids, Mich.).

"Air purifier and passive humidity module" was invented by Mitch Wesley (Grand Rapids, Mich.), Derek Smith (Grand Rapids, Mich.) and Jason Pruiett (Grand Rapids, Mich.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An air purifier and a passive humidity module for inside air. The air purifier includes a housing and an air purifier air outlet. The passive humidity module is disposed at least partially on the air purifier air outlet. The passive humidity module includes a housing assembly defining an air inlet and an air outlet, a water tank supported by the housing assembly, ...