Sphygmomanometers; Sphygmotensiometers; Arterial blood pressure measuring apparatus; Ear plugs for noise reduction; Ear plugs for soundproofing; Ear plugs for soundproofing, other than for medical use; Ear trumpets; Hearing aids; Hearing aids for the deaf; Hearing protectors without the ability to reproduce or transmit sound; Otolaryngology instruments; Thermometers for medical purposes; Electric hearing aids