Intellectual Property Law

US Patent 7798922 - Athletic field markings with quantum dots

This patent teaches using quantum dots to form photoluminescent lines that distinguish football markings and soccer markings depending on exterior lighting. Claim 1 reads:

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.

Full post as published by TinytechIP on September 22, 2010 (boomark / email).