Abstract: A system and method for identifying a vehicle via wireless signals emitted by Tire Pressure Monitoring System (TPMS) sensors, and using the identification to deliver behavioral targeted advertising or to track movement. This includes receiving, demodulating, and decoding wireless signals emitted by the TPMS sensors. Information contained in a TPMS transmission event may be used to correlate one or more TPMS sensors to a particular vehicle on which the TPMS sensors are installed, thereby providing a unique identification of the vehicle. Data extracted or derived from one or more TPMS transmission events may include the vehicle's inclusion or exclusion from one or more lists, historical traffic patterns or geographic movements of the vehicle, historical purchasing history or purchasing habits associated with the occupants of the vehicle, the previous service history of the vehicle, or the presence or absence of the vehicle at one or more geographic locations at recorded times.

Abstract: The present invention provides a method for synchronizing timekeeping devices in a system of clocks using a master/slave system and expandable data packet transmission protocol, and an apparatus for implementing such synchronizing system. The method includes embedding a circuit and data packet for transmission into each timekeeping device in the system. Time is synchronized by transmitting time information contained in the data packet protocol from the master timekeeping device to other slave timekeeping devices. Further, slave devices may transmit time information also contained within the data packet protocol to other slave timekeeping devices that are not within range of the master device. A hop count register in the data packet is also relied upon for synchronizing the time as close to the master device. Slave devices requesting time information accept the time from the transmitting device with the lowest hop count.

Abstract: The present invention provides a method for synchronizing timekeeping devices in a system of clocks using a master/slave system and expandable data packet transmission protocol, and an apparatus for implementing such synchronizing system. The method includes embedding a circuit and data packet for transmission into each timekeeping device in the system. Time is synchronized by transmitting time information contained in the data packet protocol from the master timekeeping device to other slave timekeeping devices. Further, slave devices may transmit time information also contained within the data packet protocol to other slave timekeeping devices that are not within range of the master device. A hop count register in the data packet is also relied upon for synchronizing the time as close to the master device. Slave devices requesting time information accept the time from the transmitting device with the lowest hop count.