Personal security and tracking system

  • US 8,466,795 B2
  • Filed: 02/24/2012
  • Issued: 06/18/2013
  • Est. Priority Date: 01/21/1997
  • Status: Expired due to Fees
First Claim
Patent Images

1. A portable signaling unit comprising:

  • a speaker;

    a microphone;

    a display;

    a microcontroller;

    a user interface;

    a transmitter adapted to transmit a first signal via a cellular network;

    a first receiver adapted to receive a second signal via the cellular network; and

    a second receiver adapted to receive a third signal other than the first signal and second signal,wherein the third signal is other than a cellular network transmission; and

    the transmitter is adapted to receive signals representing data and a voice of a user, and the transmitter is adapted to transmit signals representing the data and the user'"'"'s voice;

    wherein the portable signaling unit is adapted to receive a security code via the user interface; and

    wherein the display is adapted to display a message received by the portable signaling unit via the first receiver.

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