Systems and methods for activating devices such as RFID tags includes activating a device
if an activate command matches a value stored on the device. The activate command can …

57 ABSTRACT Related US Application Data(57)(63) Continuation-in-part of application No.
10/458,690, Y filed on Jun. 11, 2003, now Pat. No. 6,933,849. An object locating, identifying …

(57) ABSTRACT A radio frequency transponder includes at least one battery, which is
coupled to provide electrical powerfor operating the transponder and at least one antenna …

US20090201169A1 - Real-Time Location Systems and Methods - Google Patents
US20090201169A1 - Real-Time Location Systems and Methods - Google Patents Real-Time …

It is an advantage of the present invention to provide an apparatus and method for reducing
power consumption by efficiently performing mutual compensation between active and …

The electronic identification device or transponder (2) com prises a trigger circuit (12) linked
to receiving means (14) of an interrogation signal sent at a first frequency by a reader (4 or …

BACKGROUND 0003. In today's electronic world, the requirement for security is ubiquitous.
This translates into control of access to or use of objects, venues, and systems of electronic …

RFID readers transmit data to query RFID tags. Before transmitting the data, the RFID
readers also transmit special preambles that inform of parameters of communication that are …

5,856,788 A 1/1999 Walter et al............ 340,825.54 2002/0109597 A1 8/2002 Nelson et al....
340,573.1 5,887, 176 A 3, 1999 Griffith et al................ 395/750 2002/O126005 A1 9, 2002 …

(57) ABSTRACT A mobile communication terminal includes a first transceiver that transmits
and receives signals, an RFID transceiver that transmits and receives signals, and a …