Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Robert N. Mayo0
Jeffrey A. Morgan0
Kan Zhang0
Michael G. Lamming0
Denis Bohm0
Date of Patent
August 25, 2009
0Patent Application Number
108297140
Date Filed
April 21, 2004
0Patent Primary Examiner
Patent abstract
Methods and systems for generating time-based identifiers that are used for identifying items is described. In one embodiment, a master key is assigned to an electronic tag. Time-based other keys are generated based on the master key. Time-based identifiers are generated based on the time-based other keys. The time-based identifiers are useful only for a period of time to a holder of the time-based other keys.
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