Assistive listening device for the hearing impaired; Digital hearing aids; Electric hearing aids; Electrical hearing aids; Electrically-operated hearing aids; Electrically operated hearing aids; Gum massagers for babies; Hearing aids; Hearing aids for the deaf; Medical apparatus, namely, lung ventilators with monitoring capability; Medical apparatus, namely, respiratory equipment and monitors therefor; Medical devices for monitoring blood properties and respiratory events; Medical devices for monitoring vital signs, blood properties and respiratory events; Medical hearing instruments; Medical hearing instruments and parts of such devices; Pediatric breathing masks for medical purposes; Respirators for artificial respiration; Respirators for filtering air for medical purposes; Wearable monitors used to measure biometric data for medical use; Wireless transmitters and receivers for use with hearing aids