ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,539,387, issued on Feb. 3, was assigned to KAOHSIUNG MEDICAL UNIVERSITY (Kaohsiung, Taiwan).
"Positive-pressure respirator" was invented by Yu-Jhih Yu (Kaohsiung, Taiwan) and Lan-Yuen Guo (Kaohsiung, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A positive airway pressure device is used to solve the problem of inconvenient use of the known positive airway pressure device and comprises: a tube including an inner end hole and an outer end hole intercommunicating with the inner end hole, with the outer end hole being smaller than the inner end hole, with the tube adapted to be inserted into a nasal cavity; and a two-way valve located in the tube, wi...