10 SURGICAL, MEDICAL, DENTAL AND VETERINARY APPARATUS AND INSTRUMENTS, NAMELY STETHOSCOPES AND AUSCULTATION UNITS; ELECTRONIC STETHOSCOPES AND DOCKING STATIONS THEREFOR; PARTS AND FITTINGS FOR STETHOSCOPES AND ELECTRONIC STETHOSCOPES; SENSOR BASED APPARATUS AND INSTRUMENTS, NAMELY, STETHOSCOPES, FOR USE AS A DIAGNOSTIC AID IN PATIENT DIAGNOSIS, TREATMENT AND MONITORING IN THE FIELD OF HUMAN HEALTH BY AMPLIFYING SOUNDS FROM THE BODY'S INTERNAL ORGANS, NAMELY THE HEART, RESPIRATORY AND CIRCULATORY ORGANS