ALEXANDRIA, Va., June 16 -- United States Patent no. 12,303,088, issued on May 20, was assigned to CARL FREUDENBERG KG (Weinheim, Germany).
"Release lever for cleaning device" was invented by Doug Metzel (Lombard, Ill.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A cleaning device, including a cleaning head receiver, a cleaning head frame, a cleaning material attached to the cleaning head frame, and a release lever having a handle at a first end and an ejecting surface at a second end. The release lever is arranged within the cleaning head receiver. The release lever is configured to rotate and thereby apply an ejecting force against the cleaning head frame via the ejecting surface."
The patent was filed ...