Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2006-05-16
2008-11-25
Nguyen, Tai T (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S572200, C340S572500, C340S572700, C340S568100, C340S568200, C340S604000, C340S605000
Reexamination Certificate
active
07456744
ABSTRACT:
A remote sensing device includes a sensor and reference circuit. A resonant circuit of the sensor has a resonant characteristic modifiable by exposure to an external condition. The sensor is configured to produce a sensor signal associated with the modifiable resonant characteristic. A reference circuit of the remote sensing device is configured to produce a reference signal suitable for use in conjunction with the sensor signal. The reference signal is used to account for variations of the sensor signal due to variations in the inductive coupling between the remote sensing device and a reader designed to detect the reference signal and the sensor signal.
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Free M. Benton
Kuhns David W.
3M Innovative Properties Company
Moshrefzadeh Robert S.
Nguyen Tai T
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