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System and method for selectively marking objects

  • US 7,798,922 B2
  • Filed: 04/10/2008
  • Issued: 09/21/2010
  • Est. Priority Date: 04/11/2007
  • Status: Active Grant
First Claim
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1. A method for selectively marking a surface, the method comprising:

  • marking the surface with lines of a first material containing quantum dots having a first absorption characteristic and a first emission characteristic; and

    selectively illuminating the surface with radiation consistent with the first absorption characteristic to cause the lines of the first material to display the first emission characteristic.

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