Communications: electrical – Selective – Interrogation response
Reexamination Certificate
2005-09-06
2005-09-06
Horabik, Michael (Department: 2635)
Communications: electrical
Selective
Interrogation response
36, C375S146000, C340S010100
Reexamination Certificate
active
06940392
ABSTRACT:
An apparatus (10, 240, 300) includes a signpost (11, 241-256, 322, 612, 623, 626-628, 652, 661, 682, 686, 703) which transmits signpost signals (24) that are received by a tag (12, 271-275, 301-316, 395-397, 616-618, 641-643, 653, 656-657, 662-664, 679, 708, 711). The tag in turn transmits radio frequency beacon signals (72) which are received by a reader (13, 261, 319, 521-530) The tag can vary the duration of the beacon signals, for example in dependence on whether it is currently receiving a signpost signal. Further, the tag can dynamically vary the transmission rate and/or transmission power of the beacon signals, for example following receipt of a signpost signal. Varying these parameters can facilitate compliance with governmental regulations.
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Cargonja Nikola
Chan Joseph S.
Haynes and Boone LLP
Horabik Michael
Savi Technology, Inc.
Shimizu Matsuichiro
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