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1. An improved ignition interlock system, the system being of the type including: a plurality of ignition interlock devices; for each device, a vehicle in which said each device is installed; and a plurality of service centers, the service centers each having an associated computer adapted to extract data, the improvement comprising: a wireless transceiver associated with each device; a wireless transceiver associated with each service centre; and computing functionality associated with the service centers and the devices and adapted such that, when any of the vehicles attends at any of the service centers, the computer associated with that service center can extract the data from the device disposed within that vehicle.
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