The present invention includes an information projector slide comprising a planar member having a central window for holding a photographic film image and at least one border adjacent the window. A magnetic medium for storing selected digitally encoded alpha-numeric information is affixed to the border....http://www.google.de/patents/US4765734?utm_source=gb-gplus-sharePatent US4765734 - Digitally encoded alpha-numeric projector slide and systems for using the same
