Artificial tympanic membranes; prosthetic and filling materials, not for dental use; facial aesthetic treatment apparatus using ultrasonic waves for commercial use; electric esthetic massage apparatus for commercial use; medical apparatus and instruments; surgical apparatus and instruments; catheters; stents; artificial vascular grafts; prosthetic tissues for vascular use; artificial hearts; endoprostheses; prosthetic tissues for parietal use; prosthetic tissues for visceral use; balloon cath...