ear molds; custom-fit ear molds; earpieces; custom-fit earpieces; ear mold material; ear impression material; hearing aid acoustic coupler; hearing instrument acoustic coupler; ear tubes; ear tubing and vent plugs; ear filters for hearing protection; greaseless lubricant which eases the insertion of custom-made ear products into the ear canal; custom-fit ear plugs used for hearing aids; ear plugs used for hearing aids; custom-fit ear plugs used for protection of hearing; ear plugs used for protection of hearing; hearing aids; digital hearing aids; electric hearing aids; electrical hearing aids; hearing aids for the deaf; cast material for hearing aids; molds for hearing aids; electrically-operated hearing aids; wireless transmitters and receivers for use with hearing aids; sound processors adapted for use with prosthetic hearing devices; assistive listening device for the hearing impaired; hearing aid cleaners; hearing aid dryers; medical supplies used in the practice of audiology; medical tools used in the practice of audiology; teaching tools and apparatus in the practice of audiology; medical testing devices for measuring hearing loss in patients, namely, audiometers; medical hearing instruments and parts of such devices; parts of acoustic apparatus for the hearing-impaired, namely, cerumen protection and cleaning systems; hearing protectors without the ability to reproduce or transmit sound; noise filters used for noise reduction in ear plugs; in-ear monitors for recreational and medical purposes; ear plugs for medical purposes; custom-fit ear plugs for recreational purposes; ear plugs for recreational purposes; custom-fit ear plugs for noise reduction; ear plugs for noise reduction; ear plugs for soundproofing; hearing aid accessories, namely, vacuum pumps for medical purposes and parts and accessories therefor; otoscopes; earscopes; specula; stethoscopes