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SPATIAL TRACKING SYSTEM AND METHOD

  • US 20120001644A1
  • Filed: 06/30/2010
  • Published: 01/05/2012
  • Est. Priority Date: 06/30/2010
  • Status: Active Grant
First Claim
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1. A portable device for tracking spatial information, comprising:

  • at least one secondary placed within an external electromagnetic field that receives power from said external electromagnetic field to supply energy to device circuitry; and

    a controller that senses a strength characteristic of said external electromagnetic field received by said at least one secondary to determine spatial information about said portable device.

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