Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2006-07-24
2008-07-15
Nguyen, Hung T. (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S572300, C340S572400, C340S539100, C340S870030, C340S870030, C340S010100, C235S383000, C235S385000, C320S108000, C320S109000
Reexamination Certificate
active
07400253
ABSTRACT:
A system and device for harvesting various frequencies and polarizations of ambient radio frequency (RF) electromagnetic (EM) energy for making a passive sensor (tag) into an autonomous passive sensor (tag) adapted to collect and store data with time-stamping and some primitive computation when necessary even when an interrogating radio frequency identification (RFID) reader is not present (not transmitting). A specific source of ambient RF EM energy may include wireless fidelity (WiFi) and/or cellular telephone base stations. The system and device may also allow for the recharging of energy storage units in active and battery assisted passive (BAP) devices. The system could be a “smart building” that uses passive sensors with RF EM energy harvesting capability to sense environmental variables, security breaches, as well as information from “smart appliances” that can be used for a variety of controls and can be accessed locally or remotely over the Internet or cellular networks.
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Gibb & Rahman, LLC
MHCMOS, LLC
Nguyen Hung T.
Rahman, Esq. Mohammad S.
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