10 (in use) airflow attenuators and resistors specially adapted for use in connection with continuous positive airway pressure therapy machines and medical ventilators; (intent to use) medical apparatus, namely, continuous positive airway pressure devices, variable positive airway pressure devices, and bi-level positive airway pressure devices; medical apparatus, namely, positive airway pressure devices designed to treat sleep disordered breathing; pressure adjusting feature sold as a component of continuous, variable, and bi-level positive airway pressure devices; oxygen concentrators; respiratory masks for medical purposes; cpap masks; parts for all the foregoing