<http://webisa.webdatacommons.org/217700716> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/prov/266379526> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/217700716> . <http://webisa.webdatacommons.org/217700716> <http://www.w3.org/ns/prov#wasQuotedFrom> <google.fr> . <http://webisa.webdatacommons.org/prov/267716951> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/217700716> . <http://webisa.webdatacommons.org/217700716> <http://www.w3.org/ns/prov#value> "shape and radial density profileUS6788821 *13 juin 20017 sept. 2004Matsushita Electric Industrial Co., Ltd.Digital information embedding/extracting apparatus and method, and medium including a program for executing the method recorded thereonUS687970129 sept. 199912 avr. 2005Digimarc CorporationTile-based digital watermar" .