ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,495,942, issued on Dec. 16, was assigned to VERSUNI HOLDING B.V. (Eindhoven, Netherlands).
"Wet cleaning apparatus" was invented by Bastiaan Johannes De Wit (Eindhoven, Netherlands), Willem Wiersema (Eindhoven, Netherlands) and Fokke Roelof Voorhorst (Eindhoven, Netherlands).
According to the abstract* released by the U.S. Patent & Trademark Office: "A wet cleaning apparatus including a cleaner head and an underpressure generator arrangement, is described. The cleaner head has at least one dirt inlet, and a porous material covering the at least one dirt inlet. The underpressure generator arrangement includes an underpressure generator to provide a flow inside the wet cleaning apparat...