| http://www.w3.org/ns/prov#value | - Patente US20020029200 - System and method for providing certificate validation and other services - Google PatentesB???squeda Im???genes Maps Play YouTube Noticias Gmail Drive M???s ??Iniciar sesi???n B???squeda avanzada de patentesPatentesA system and method for facilitating electronic commerce by securely providing certificate-related and other services including certificate validation and warra
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