Telephonic signal recorders for recording through the medium of electricity on a phonograph telephonic signals, telephonic-signal amplifiers consisting of complete units for amplifying by electric power telephonic signals, thermionic or electron tubes, transformers, loud speakers, telephone receivers, sockets, resistances, resistance mountings, condensers and parts of the above,

Blood testing apparatus; anaesthetic apparatus; galvanic therapeutic appliances; apparatus for artificial respiration; apparatus for the treatment of deafness; physical exercise apparatus for medical purposes; body rehabilitation apparatus for medical purposes; dental apparatus and instruments; surgical apparatus and instruments; resuscitation apparatus; dental apparatus, electric; physiotherapy apparatus; diagnostic apparatus for medical purposes; radiological apparatus for medical purposes; X-ray apparatus for medical purposes; injectors for medical purposes; medical apparatus and instruments; X-ray photographs for medical purposes; tomographs for medical purposes; X-ray tubes for medical purposes; radium tubes for medical purposes; protection devices against X-rays, for medical purposes; radiology screens for medical purposes; testing apparatus for medical purposes; apparatus and installations for the production of X-rays, for medical purposes.