A system and method for certified transmission of an electronic document, as verified by the generation of a certification indicia. Three embodiments of the system and method are disclosed, providing for the certified transmission of a document through an independent certification device or for direct...http://www.google.es/patents/US5982506?utm_source=gb-gplus-sharePatente US5982506 - Method and system for electronic document certification
Method and system for electronic document certification
