ALEXANDRIA, Va., March 19 -- United States Patent no. 12,252,912, issued on March 18.
"Doorstop with replaceable parts" was invented by Robert O. Duff (Apple Valley, Minn.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A doorstop includes a first foot with a first sloped portion at a first end of the foot, a second sloped portion at a second end of the foot, a pedestal portion between the first end of the foot and the second end of the foot, and a bore in the pedestal portion and extending through the foot. The pedestal portion is flat and raised from the first sloped portion and the second sloped portion. The doorstop also includes an insert that fits inside the bore, a fastener that holds the insert inside...