SURGICAL IMPLANTS COMPOSED PRIMARILY OF ARTIFICIAL MATERIAL, COCHLEAR IMPLANT SYSTEMS COMPOSED PRIMARILY OF ARTIFICIAL MATERIAL AND COMPRISING SPEECH PROCESSORS; COCHLEAR IMPLANTS COMPOSED PRIMARILY OF ARTIFICIAL MATERIAL; ELECTRODES FOR MEDICAL PURPOSES, ELECTRODES FOR USE IN IMPLANTS COMPOSED OF ELECTRODE MATERIAL; DIAGNOSTIC APPARATUS FOR MEDICAL PURPOSE; HEARING AIDS; HEARING PROSTHESES; HEARING AIDS FOR PARTIAL OR COMPLETE IMPLANTATION, SURGICAL DEVICES AND INSTRUMENTS FOR SURGERY IN THE...