Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2005-08-09
2005-08-09
Hofsass, Jeffery (Department: 2636)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S568100, C340S870030, C340S870030, C340S870030
Reexamination Certificate
active
06927692
ABSTRACT:
A system and method for calculating a quantity of items wherein each item has a tag attached to it. A low intensity RF signal is radiated, causing each tag to generate a reflected signal. The frequency response of the reflected signals is then measured, and the quantity of tagged items is calculated based on the frequency response of the reflected signals.
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American Greetings Corporation
Hofsass Jeffery
Pham Lam
Roetzel & Andress
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