A nasal cannula and mouthpiece assembly for delivering oxygen to a person is provided having a nasal cannula, at least two mouthpieces, two pairs of oxygen supply tubes and two sets of adjustors. Each mouthpiece has a first outer end for receiving oxygen and a second outer end with a first and second...http://www.google.fr/patents/US7866320?utm_source=gb-gplus-shareBrevet US7866320 - Nasal canula and mouthpiece assembly and method
