| http://www.w3.org/ns/prov#value | - The operator, such as a parent or employer, can later retrieve the screen images to provide a graphical record...http://www.google.es/patents/US6446119?utm_source=gb-gplus-sharePatente US6446119 - System and method for monitoring computer usage B???squeda avanzada de patentes N???mero de publicaci???nUS6446119 B1Tipo de publicaci???nConcesi???n N???mero de solicitudUS 08/959,932 Fecha de publicaci
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