ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,486,654, issued on Dec. 2.

"Drain trap" was invented by James Knuth (Barneveld, N.Y.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A drain trap includes an outer part including a circumferential wall, the outer part extending in an axial direction between an outer part upper end and an outer part lower end, the outer part including outer part radial threads proximate the outer part upper end, the outer part lower end forming a well configured to trap and retain fluid, the outer part further including at least one opening disposed in the circumferential wall, an inner part, and a rounded structure retained within the well. Fluid entering the drain trap a...