Communications: electrical – Condition responsive indicating system – With particular coupling link
Reexamination Certificate
2005-12-20
2005-12-20
Crosland, Donnie L. (Department: 2636)
Communications: electrical
Condition responsive indicating system
With particular coupling link
C340S870030, C340S539220, C340S539100, C340S539230, C340S870030, C342S450000
Reexamination Certificate
active
06977587
ABSTRACT:
A device having a signal module configured to transmit a first type of signal and a second type of signal and to receive the first type of signal and the second type of signal. The device also includes a timer and a controller configured to operate the signal module and timer. The controller is operable to determine a location of the device with respect to another device based upon the time elapsed between transmission and receipt of the first type of signal and transmission and receipt of the second type of signal.
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patent: 6493649 (2002-12-01), Jones et al.
patent: 2003/0033032 (2003-02-01), Lind et al.
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Ainsworth, Diane, “‘Smart’ sensors promise savings in electricity costs”, Berkeleyan, www.berkeley.edu
ews/berkeleyan/2001/06/07—smart.html, Jun. 15, 2001.
Patel Chandrakant D.
Pradhan Salil
Smith Mark T.
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