The system synchronizes, displays, and manipulates text and image documents in electronic form for display. The text and image files are synchronized to produce Equivalent Files to create an approximate equivalence relationship between the text and the image files. The graphic user interface of the present...http://www.google.de/patents/US5950214?utm_source=gb-gplus-sharePatent US5950214 - System, method, and computer program product for accessing a note database having subnote information for the purpose of manipulating subnotes linked to portions of documents
