Medical apparatus for treatment of respiratory disorders; medical ventilators and parts therefor; respirators for artificial respiration and parts therefor; [ humidifiers for medical use and parts therefor; ] medical apparatus, namely, continuous positive airway pressure (cpap) and automatic positive airway pressure (apap) devices and parts therefor; [ respiratory masks for medical purposes and parts therefor; headgear for medical respiratory masks and parts therefor; ] respiration monitors a...