Communications: electrical – Continuously variable indicating – With meter reading
Reexamination Certificate
2006-03-28
2006-03-28
Zimmerman, Brian (Department: 2635)
Communications: electrical
Continuously variable indicating
With meter reading
C340S010100, C340S010400, C340S524000, C340S572100, C340S870030, C340S870030, C340S574000, C340S531000, C340S539100, C340S010500
Reexamination Certificate
active
07019663
ABSTRACT:
Described is a system and method for tracking an asset. The system may include an RF tag coupled to the asset; a wireless wide area network (“WWAN”) including a plurality of transceivers and having a first coverage area; and a plurality of wireless local area networks (“WLAN”). Each of the WLANs has a second coverage area within the first coverage area. In addition, the system includes a computer which communicates with the WWAN and the WLANs. The computer generates a signal to be transmitted to the asset using a first transceiver of the WWAN. The asset receives the signal and generates a response signal; the asset transmits the response signal to a particular WLAN within which second coverage area the asset is located via a plurality of second transceivers. The computer determines the location of the asset within the second coverage area as a function of the response signal.
REFERENCES:
patent: 6480108 (2002-11-01), McDonald
patent: 6486794 (2002-11-01), Calistro et al.
patent: 6552661 (2003-04-01), Lastinger et al.
patent: 6738628 (2004-05-01), McCall et al.
patent: 2001/0036810 (2001-11-01), Larsen
patent: 2002/0062385 (2002-05-01), Dowling
patent: 2003/0104848 (2003-06-01), Brideglall
Brown Vernal
Fay Kaplun & Marcin LLP
Symbol Technologies Inc.
Zimmerman Brian
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