Abstract: A window breaker tool for use on a vehicle includes a body having a handle to enable a user to grip the tool, a glass breaker member extending from the handle configured to contact a glass window with force to break the glass window, and an accelerometer operatively coupled to the body to sense acceleration during impact and generate a signature signal. The tool also includes an RF signal communication device located on the tool for communicating with a plurality of RF signal communication devices on the vehicle to determine a location of the tool relative to the vehicle, wherein the RF signal communication device communicates with a controller for processing the signature signal and determining whether the signature signal is indicative of the tool in use to break a window, and wherein the controller further determines the tool is within the vehicle based on the location and outputs an alert signal.

Abstract: The authenticity of an item which is one of a group of such items can be determined by attaching to or incorporating into each such item an authentication marker, all such markers interacting substantially identically with a given magnetic field. A field generating apparatus is provided which incorporates a reference sample that interacts with the given magnetic field in the same way as the authentication markers do. The field generating apparatus subjects both the reference sample and a candidate authentication marker to substantially identical magnetic search fields.