Access Control System With Multi-Segment Access Codes and Automatic Void List Deletion
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United States of America Patent
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N/A
Issued Date -
May 15, 2008
app pub date -
Mar 9, 2005
filing date -
Mar 9, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An access control system is for at least first and second doors each having a lock adjustable between locked and unlocked states. A key has a code including first and second segments. A first controller coupled with the first door lock has a stored value and is configured to receive the key code and to compare at least the code first segment with the stored value, and unlocks the first lock when the code first segment corresponds with the stored value. A second controller coupled with the second door lock has a stored value and is configured to receive the key code and to compare at least the second code segment with the second stored value, and unlocks the second lock when either the code second segment corresponds with the second stored value or both code segments correspond with separate portions of the second value.
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