Radio-frequency identification system, method of carrying...

Details Radio-frequency identification system, method of carrying... Radio-frequency identification system, method of carrying...

2005-07-12

2005-07-12

Pope, Daryl C (Department: 2632)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S505000, C340S539100, C340S572100, C340S010100

Reexamination Certificate

active

06917292

ABSTRACT:
A radio-frequency identification system includes (a) responders each having a unique identification number, (b) an interrogator making an inquiry to and receiving a response from each of the responders, and (c) a host computer controlling communication made between the responders and the interrogator, and binary-searching a number space of the identification number of each of the responders for identifying a responder(s) existing in a communication area in which the responders and the interrogator can make communication with each other. The host computer has a function of acting as a discriminator for generating a control signal in accordance with first to N-th (N≧2) communication areas in each of which the responders and the interrogator can make communication with each other, binary-searching the number space in each of the first to N-th communication areas one by one to identify a responder(s) existing therein, and inactivating the thus identified responder(s).

REFERENCES:
patent: 5591951 (1997-01-01), Doty
patent: 5627544 (1997-05-01), Snodgrass et al.
patent: 5959568 (1999-09-01), Woolley
patent: 6104279 (2000-08-01), Maletsky
patent: 6282186 (2001-08-01), Wood, Jr.
patent: 6307847 (2001-10-01), Wood, Jr.
patent: 6499656 (2002-12-01), Marsh et al.
patent: 3051561 (2000-03-01), None

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