A mask system includes a frame, cushion, cushion clip, swivel elbow, headgear and/or headgear clips that are configured for use in a clinical or hospital environment. One or more components of the mask system are configured to promote single patient use, e.g., by providing an age indicator and/or preventing...http://www.google.es/patents/US8136524?utm_source=gb-gplus-sharePatente US8136524 - Disposable mask system
