Medical apparatus and instruments; respiratory apparatus and instruments; humidification apparatus; apparatus for the treatment of obstructive sleep apnea; ventilation and non-invasive ventilation apparatus and instruments; medical apparatus and instruments for positive pressure therapy; medical apparatus and instruments for cpap (continuous positive airway pressure) and bi-level therapy; humidifiers and meters for cpap and bi-level therapy; sleep apnoea monitors; facial masks, oral masks, nasal masks, nasal cannula, mouthpieces, nasal guards, facial guards, headgear, all being for medical purposes; parts and fittings for all the aforementioned goods