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Methods and apparatuses for transmission of an alert to multiple devices

  • US 8,831,635 B2
  • Filed: 07/21/2011
  • Issued: 09/09/2014
  • Est. Priority Date: 04/04/2005
  • Status: Active Grant
First Claim
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1. A method comprising:

  • transmitting an alert to mobile communication devices that are in a selectively-defined group of one or more communication devices whereintransmitting the alert is in response to not receiving a response to a periodic message transmitted to a first mobile communication device, the first mobile communication device including a GPS receiver adapted to generate GPS coordinates of the first mobile communication device,the response requires input of a secret code from a user of the first mobile communication device,the alert includes position of the first mobile communication device dependent on the GPS coordinates from the first mobile device, andthe alert comprises a timestamp associated with the position, the timestamp representing time at which the GPS coordinates were generated.

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