| http://www.w3.org/ns/prov#value | - The...http://www.google.com/patents/US4907272?utm_source=gb-gplus-sharePatent US4907272 - Method for authenticating an external authorizing datum by a portable object, such as a memory cardAdvanced Patent SearchPublication numberUS4907272 APublication typeGrantApplication numberUS 07/171,430Publication dateMar 6, 1990Filing dateJul 9, 1987Priority dateJul 11, 1986Fee statusPaidAlso published asCA1
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