Air filters for medical ventilators; Apparatus for artificial respiration; Humidification apparatus for medical purposes; Humidifiers for medical use; Medical apparatus for diagnosing or treating respiratory conditions; Medical apparatus, namely, bi-level positive airway pressure (BPAP) devices; Medical apparatus, namely, continuous positive airway pressure (CPAP) devices; Medical apparatus, namely, invasive and non-invasive ventilation apparatus and instruments; Medical apparatus, namely, respiratory equipment and monitors therefor; Medical apparatus, namely, variable positive airway pressure devices (VPAP); Medical products, namely, respiratory sensors; Medical ventilator tubing and tubing connectors; Medical ventilators; Patient breathing system comprising a breathing circuit, connections to patient, ventilator, scavenger, fresh gas delivery circuit and carbon dioxide absorber; Respiration monitors; Respirators for artificial respiration; Respiratory masks for medical purposes and structural parts therefor; Textile covers for medical ventilator tubing; Textile headgear specially adapted for use with medical ventilator mask interfaces; Textile covers for straps on facially oriented medical device; Meters for medical use, namely, positive airway pressure therapy and measuring pulse and heart rate; Pumps for medical respirators for artificial respiration; Feedback controllers used in direct association with medical respirators for artificial respiration; Flow sensor used in direct association with medical respirators for artificial respiration