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Locator system

  • US 9,807,556 B2
  • Filed: 12/28/2015
  • Issued: 10/31/2017
  • Est. Priority Date: 07/29/1999
  • Status: Expired due to Fees
First Claim
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1. A locator system comprising:

  • a locator device including a GPS receiver, a central processing unit (CPU) coupled to the GPS receiver, a wireless communication interface operable to communicate with a server computer, and a power source operable to provide power to the GPS receiver, the CPU, and the wireless communication interface, the locator device configured to;

    use the GPS receiver to receive signals from a plurality of GPS satellites;

    determine positional data of the locator device based on the received signals;

    use the wireless communication interface to transmit the positional data to the server at a periodic transmission rate;

    determine a relative positional change by comparing currently calculated positional data with previously calculated positional data;

    increase the periodic transmission rate when the relative positional change increases; and

    decrease the periodic transmission rate when the relative positional change decreases; and

    a computer software program configured to;

    execute on the server computer,receive the positional data,receive a request from a client for the positional data of the locator device, andprovide the positional data to the client in response to the request from the client,wherein the server does not query the locator device for its positional data in response to the request from the client.

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