Radio frequency identification transponder

Details Radio frequency identification transponder Radio frequency identification transponder

2007-06-26

2008-08-19

Zimmerman, Brian (Department: 2612)

Communications: electrical

Selective

Interrogation response

C340S010200, C340S010320, C340S010340, C340S010510, C340S541000, C235S375000, C235S384000, C341S173000, C341S176000, C342S042000, C342S044000, C342S050000, C343S701000, C365S222000, C368S121000, C368S009000, C370S445000, C701S200000, C711S125000

Reexamination Certificate

active

07414517

ABSTRACT:
A radio frequency identification transponder includes a power supply and a dynamic memory array that stores data. When power from the power supply ceases, the data in the dynamic memory array is validly maintained for a predetermined period of time. The dynamic memory array is responsive to an interrogating signal for selectively updating the data. A radio frequency identification transponder includes a signal processor that extracts an identifier from the interrogation signal and is responsive to the identifier and the stored data to determine whether some or all of the identifier is stored in the dynamic memory array.

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