An interactive medical test selector for use by a patient is about the size of a book and has a screen for displaying questions to a patient, a limited number of keys by which the patient can enter answers, and a memory device for storing the patient's answers. The test selector is battery-powered for...http://www.google.de/patents/US5341291?utm_source=gb-gplus-sharePatent US5341291 - Portable medical interactive test selector having plug-in replaceable memory
