Apparatus for dispensing non-medical oxygen and aromatherapy that also utilizes light, sound, and vibration for relaxation therapy; Armchairs for medical or dental purposes; Assistive listening device for the hearing impaired; Cosmetic apparatus using ultrasound for performing aesthetic skin treatment procedures; Cosmetic apparatus, namely, light based devices providing mainly pulsed light for performing non-ablative aesthetic skin treatment procedures; Dental foundation supports; Dental instruments, namely, root canal therapy instruments used to shave the inside of a root canal; Lasers for the cosmetic treatment of the face and skin; Medical apparatus, namely, an injectable oxygen delivery system comprising an oxygen device which produces nanobubbles and nanobatteries to prevent or treat eye disease; Medical devices for nonsurgical cosmetic treatments; Medical testing devices for measuring hearing loss in patients, namely, audiometers; Mouth exerciser for use in exercising and strengthening mouth and facial muscles for medical and beauty benefits; Mouth guards for medical purposes; Phototherapeutic apparatus for medical purposes, namely, a LED (light-emitting diode) light source for medical and aesthetic skin treatments; Surgical apparatus and instruments for medical, dental or veterinary use