Assistive listening device for the hearing impaired; Digital hearing aids; Ear plugs for noise reduction; Ear plugs for soundproofing; Electrical hearing aids; Electrically-operated hearing aids; Electrocardiographic (ECG) recorders and electrocardiographic (ECG) digital plasters sold as a unit; Hearing aids; Hearing aids for the deaf; Hearing protectors without the ability to reproduce or transmit sound; Medical endoscopes; Medical hearing instruments and parts of such devices; Medical instr...