ALEXANDRIA, Va., April 9 -- United States Patent no. 12,268,909, issued on April 8.
"Electrically heated respirator" was invented by Weining Tan (Mississauga, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A set of designs for an electrically heated respirator/face mask to kill or deactivate airborne viruses and bacteria by creating a seamless thermal and/or humidity chamber/barrier around the wearer's nose and mouth area; in addition to efficiently filtering the tiny particles according to NIOSH N95 standards, it reduces the chance of contracting the disease. The designs include various combinations: a disposable or reusable N95 respirator with or without an exhalation valve, disposable or reusable m...