Air filters for medical ventilators; Breathing apparatus for medical purposes; Face shields for medical use; Filters for respiratory masks for medical purposes; Medical ventilators; Medical ventilator tubing and tubing connectors; Oxygen masks for medical purposes; Pediatric breathing masks for medical purposes; Protective visors for medical use; Respirators for filtering air for medical purposes; Respiratory masks for artificial respiration; Textile headgear specially adapted for use with me...