Heinz Diefenbach GmbH Elektromedizin: Universal recording installations for hospital and research. Poligraphs, Apparatus for vessel diagnostics, Devices for cardiovascular diagnosis; Nihon Kohden Europe GmbH: Universal recording installations for hospital and research. Poligraphs, Communication equipment and systems, Electro-encephalographs; HUGO SACHS ELEKTRONIK - HARVARD APPARATUS GMBH: Universal recording installations for hospital and research. Poligraphs, Computer-aided data acquisition and evaluation, Physical and biological medicine (examination, treatment and measuring devices); Walter Graphtek GmbH: Universal recording installations for hospital and research. Poligraphs, Monitoring, patient supervision, Physical and biological medicine (examination, treatment and measuring devices); ...