ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,508,450, issued on Dec. 30, was assigned to Jeffrey Richard Dewispelaere (Elk River, Minn.).

"Antiviral mobile respiratory personal protection device" was invented by Jeffrey Richard Dewispelaere (Elk River, Minn.) and Frank Edward Kaczmarek (Ivanhoe, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Invention is described which sterilizes air contaminated with airborne virus by means of superheating the air to over 400 Fahrenheit then cooling air to breathable temperatures. The invention disposes a fan pushing contaminated air into a positive temperature coefficient semiconductor heater to superheat the air which is subsequently cooled by a two stag...