ALEXANDRIA, Va., March 17 -- United States Patent no. 12,576,231, issued on March 17, was assigned to SOMNETICS INTERNATIONAL INC. (Fridley, Minn.).

"Inline muffler and positive airway pressure therapy apparatus including same" was invented by Paul Raymond Williams Jr. (Cottage Grove, Minn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An inline muffler for use with a positive airway pressure (PAP) apparatus. The muffler may provide an expansion chamber with baffles that capture acoustic energy using, for instance, a disruptive gas flow path to effectively reduce downstream noise associated with a flow of pressurized gas produced by the PAP apparatus. In some embodiments, the muffler is constructed of two m...