A patient interface that includes a support body having a cushion and cheek interfaces. Collectively, the cushion and cheek interfaces operate to distribute compressive forces exerted on the user's face. The support body of the patient interface is constructed from a flexible material to impart additional...http://www.google.es/patents/US7624735?utm_source=gb-gplus-sharePatente US7624735 - Cheek-mounted patient interface
