ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,426,916, issued on Sept. 30, was assigned to Free Flow Medical Inc. (Fremont, Calif.).

"Devices, methods, and systems to treat chronic bronchitis" was invented by Mark L. Mathis (Reno, Nev.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Systems and methods involve abrading a patient lung airway wall to reduce mucus production therein. Exemplary techniques include rotationally and/or linearly oscillating an abrasive material against the airway wall so as to damage mucus producing tissues, for example by removing goblet cells, while destroying less than the entire airway wall. The abrasive material may be present on the surface of an expandable balloon b...