Hearing aids for the deaf; Ear plugs for hearing protection; Ear trumpets; Hearing protectors without the ability to reproduce or transmit sound; Surgical implants comprised of artificial materials; Medical apparatus and instruments for use in surgery; Medical diagnostic apparatus for testing hearing; Ultrasound diagnostic apparatus for medical purposes; Hearing aids; Spectacles; Spectacle lenses; Spectacle frames; Spectacle chains; Spectacle cords; Spectacle cases; Anti-glare spectacles; Pince-nez; Medical hearing instruments; Medical devices for use in treating hearing disorders; Medical testing devices for measuring hearing loss in patients, namely, audiometers; Hearing aids with a noise cancelling function; Earmuffs for hearing protection