A breathing arrangement includes a patient interface, at least one inlet conduit, and a headgear assembly. The patient interface includes a mouth covering assembly including a cushion structured to sealingly engage around exterior of a patient's mouth in use, a nozzle assembly including a pair of nozzles...http://www.google.fr/patents/US7942148?utm_source=gb-gplus-shareBrevet US7942148 - Compact oronasal patient interface
