Usage modification of RFID transponder

Telecommunications – Transmitter and receiver at separate stations – Near field

Reexamination Certificate

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Details

C455S041200, C340S571000, C340S572100, C340S572200

Reexamination Certificate

active

07469126

ABSTRACT:
An RFID transponder is disclosed in which predetermined conductive portions will be removed from the transponder should the transponder be removed from a first object to which it is attached. The transponder has a first response to applied RF before the predetermined portions are removed and a second response after such removal. An RF detector can be used to scan objects with transponders to detect the first or the second response and thereby determine when a transponder has been moved.

REFERENCES:
patent: 4021705 (1977-05-01), Lichtblau
patent: 5508684 (1996-04-01), Becker
patent: 6121880 (2000-09-01), Hughes et al.
patent: 7042357 (2006-05-01), Girvin et al.
patent: 7049962 (2006-05-01), Atherton et al.
patent: 7081815 (2006-07-01), Runyon et al.
patent: 7102522 (2006-09-01), Kuhns
patent: 7316358 (2008-01-01), Kotik et al.
patent: 2007/0029384 (2007-02-01), Atherton
patent: WO 01/71848 (2001-09-01), None
patent: WO 02/077939 (2002-10-01), None

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