Electro-physiological instruments and apparatus, namely, electromyography (EMG) instruments, electroencephalography (EEG) instruments, evoked potential (EP) instruments, sleep analyzers, ambulatory electroencephalography (EEG) recorders, needle electrodes for electromyography (EMG) recording, electrodes for electromyography (EMG), electroencephalography (EEG) and evoked potential (EP) investigations, all for use in diagnosis and research for medical and surgical purposes and component parts t...

Oscillographs and component parts therefor

GENERAL PURPOSE FIBER OPTIC VIDEO DATA RECORDER AND GENERAL PURPOSE GRAPHICAL RECORDER