ALEXANDRIA, Va., March 19 -- United States Patent no. 12,253,283, issued on March 18, was assigned to Bock Water Heaters Inc. (Madison, Wis.).
"Water heater with compact heat exchanger" was invented by Jonathan Neal Gourlie (Sun Prairie, Wis.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A water heater has a heat exchanger positioned within a water tank and connected to an inlet for combustion gases for heating the water within the tank. The heat exchanger has a cylindrical first flue extending downwardly from the inlet with a lower end terminated at a 45-degree first bevel cut. Short fins are fixed to the interior of the first flue. A second cylindrical flue of the same diameter as the first flue extends u...