Data administration method which prevents the infringement of a copyright by encrypting and distributing digital content, and readily grasps which contents are contained in the digital content included in the data. Preparing symbol information symbolized so as to visually and auditorily recognize the...http://www.google.fr/patents/US20020059522?utm_source=gb-gplus-shareBrevet US20020059522 - Data Administration method
Numéro de demande: 09/811,550 Numéro de publication: US 2002/0059522 A1 Date de dépôt: 20 mars 2001 Brevet délivré: US7046807 ( Date de délivrance 16 mai 2006)
