Patent 9486598 was granted and assigned to Nihon Kohden on November, 2016 by the United States Patent and Trademark Office.
An oxygen mask can include an oxygen supply unit and an attachment unit which is to be attached to a periphery of a nose or a nose and a mouth of a patient. The attachment unit includes an opening which communicates with external air and which is formed at a position to which, when the oxygen mask is attached to the patient, at least one of the nose and the mouth of the patient is opposed.