A respiratory mask having a flexible, mask seal portion for engagement with the face of a user, a gel forehead cushion and a rotatable elbow coupling having integral exhaust ports. The mask seal portion has a thin section which permits the mask to more easily adapt to the contour of the face of the user....http://www.google.es/patents/US20030019496?utm_source=gb-gplus-sharePatente US20030019496 - Respiratory mask
Número de solicitud: 10/251,490 Número de publicación: US 2003/0019496 A1 Fecha de presentación: 20 Sep 2002 Patente emitida: US7665464 ( Fecha de emisión 23 Feb 2010)
