Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
July 10, 2007
Patent Application Number
10362161
Date Filed
August 30, 2001
Patent Primary Examiner
Patent abstract
An unlock system does not use a key that might be copied so that only a correct person can unlock a door and security is enhanced. Unlock records of door-lock are stored in a limited memory capacity in volume.
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