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Scientific apparatus and instruments, namely, telescopes and microscopes; optical apparatus and instruments, namely, optical filters, optical glasses, optical lens sights, optical scanners, optical readers, optical reflectors and binoculars; apparatus for recording, transmission or reproduction of sound or images; blank magnetic data carriers; blank recording discs; spectacles; spectacle frames; frames and holders for spectacles; frames for spectacle glasses; sunglasses; goggles for sports; spectacle cases; surveyors' levels; correcting lenses; contact lenses; sunglass lenses; lenses for optical applications or designed to protect the eyes; eye protections, namely, safety goggles; spectacle guards; cases for contact lenses; magnifying glasses; headbands, cords, twists, chains and laces for holding glasses; containers and holders for contact lenses; apparatus and instruments for the amplification of sounds and their accessories intended for those who are hard of hearing, namely, hearing aids and batteries for use therewith; head phones; noise protective headwear; acoustic diaphragms; amplified earphones; loudspeakers; microphones; megaphones; acoustic measuring devices and apparatus; sound locating instruments, namely, sound pick-ups and sound level meters; acoustic, electric or electronic apparatus and devices to improve audition and viewing of television, radio, telephone or other audiovisual or telecommunication apparatus, namely, audio speakers and amplifiers; electrical cables and connecting cords between battery adapters and amplifying and receiving apparatus; apparatus producing oscillations, namely, oscillators