System and method for inventorying multiple remote objects

Details System and method for inventorying multiple remote objects System and method for inventorying multiple remote objects

2007-10-23

2007-10-23

Hofsass, Jeffery (Department: 2612)

Communications: electrical

Selective

Interrogation response

C340S010310, C340S010400, C340S010510, C340S870030, C340S008100, C340S870030, C340S571000, C235S375000

Reexamination Certificate

active

10425232

ABSTRACT:
A system and method of inventorying multiple objects utilizing a multi-level or a chained radio frequency identification system. The system includes a master tag and a plurality of upper level tags and lower level tags associated with respective objects. The upper and lower level tags communicate with each other and the master tag so that reading of the master tag reveals the presence and absence of upper and lower level tags. In the chained RF system, the upper and lower level tags communicate locally with each other in a manner so that more remote tags that are out of range of some of the upper and lower level tags have their information relayed through adjacent tags to the master tag and thence to a controller.

REFERENCES:
patent: 5804810 (1998-09-01), Woolley et al.
patent: 5952922 (1999-09-01), Shober
patent: 6297734 (2001-10-01), Richardson et al.
patent: 6826514 (2004-11-01), Antico et al.

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