Communications: electrical – Condition responsive indicating system – With particular coupling link
Reexamination Certificate
2008-05-06
2010-11-30
Nguyen, Tai T (Department: 2612)
Communications: electrical
Condition responsive indicating system
With particular coupling link
C340S539150, C340S539210, C340S505000, C340S573100, C340S573400, C340S577000, C340S692000, C340S815450, C455S456100, C455S456600
Reexamination Certificate
active
07843327
ABSTRACT:
A method of monitoring a portable electronic device electronically is provided. The method comprises receiving a first radio signal, the first radio signal emitted by the electronically monitored portable electronic device and determining a first received signal strength of the first radio signal. The method also comprises receiving a second radio signal, the second radio signal emitted by the electronically monitored portable electronic device, the second radio signal received after the first radio signal. The method also comprises determining a second received signal strength of the second radio signal, comparing the second received signal strength to the first received signal strength, and alerting when a result of the comparing exceeds a threshold.
REFERENCES:
patent: 4675656 (1987-06-01), Narcisse
patent: 4785291 (1988-11-01), Hawthorne
Delker Jason R.
DiMartino Allison A.
Everson John M.
Whitney Jason K.
Nguyen Tai T
Sprint Communications Company L.P.
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