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Aids for laryngectomized and tracheotomized patients, namely, shunt valves, stoma buttons and accessories therefor, including artificial noses, filter inserts, tracheal compresses, cannulae support straps, speech valves, stoma filters and fittings therefor; Tracheotomy tubes; Respirators for artificial respiration; Medical prostheses; Moisture exchangers for medical use in transferring the heat of exhaled breath to inhaled breath; Ventilator exhalation valves for artificial respiration; Surgical instruments; Voice simulating prostheses; Medical instruments for percutaneous tracheostomy; Laryngectomy protectors; Tympanostomy tubes; Catheters for medical use; Medical implants; Valves for use in medical infusion instruments; Patient ventilation instruments; Medical apparatus and instruments; Speech aid (therapy) apparatus; Electrolarynxes