Patent ID: 7400249

Claim:
A personal alarm device of a type including an activation switch for generating a signal and a transmission system for transmitting the signal to a remote location, the device comprising: a. An identification signal generator associated with a portable unit for including in the generated signal an identification component for uniquely identifying the portable unit upon receiving by a local wireless receiver in proximity to said portable unit; b. A location signal generator associated with the alarm device whereby the location of the uniquely identified portable unit may be identified by the location of the local receiver receiving the signal from the portable unit, c. A wireless signal transmitter adapted to transmit the location of the portable unit, wherein the wireless signal transmitter is at least one of: an RF transmitter, an IR transmitter, and an ultrasonic transducer and generator; and d. An associated surveillance system including a recorder for recording surveillance data prior to receiving an activation signal from the devices, wherein the recorded surveillance data is transmitted to the remote location upon receipt of the activation signal.