A surgical mask for covering a nose and mouth of a person is disclosed. The mask is designed to facilitate the flow of air through the nose. The mask includes a stiff, adhesive strip which, when secured over the nose, opens the nasal passages to allow more air to flow therethrough. In addition, ...http://www.google.fr/patents/US5803075?utm_source=gb-gplus-shareBrevet US5803075 - Surgical mask with adhesive strip to improve breathing
Surgical mask with adhesive strip to improve breathing
