Compressor modules being parts of ventilators (medical); Devices for mounting medical ventilators; Hoses adapted for use with medical ventilators; Medical ventilators; Patient ventilation apparatus, instruments and machines; Pneumatically operated patient ventilation apparatus, instruments and machines; Pneumatically operated valve assemblies for ventilation apparatus, instruments and machines (medical); Ventilator breathing apparatus, instruments and machines for artificial respiration; Ventilator exhalation valves for artificial respiration; Ventilator filters (parts of medical apparatus); Pneumatically operated medical apparatus, instruments and machines; Medical apparatus, instruments and machines; Apparatus, instruments and machines for the treatment of breathing difficulties; Accessories, fittings and parts for the foregoing