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US 2004/0000575 A1Published application
Method for marking gemstones with a unique micro discrete indicia
OwnerDavid L. Patton, John P. Spoonhowerinventors
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Abstract
A method for providing and reading micro-discrete indicia on a gemstone using near-field optics.
Claims6
A gemstone having a micro-discrete indicia formed thereon wherein said micro-discrete indicia image was formed using near-field optics.
A gemstone according to claim 2 wherein said near-field optics produces said micro-discrete indicia by ablation of an image on the surface of said gemstone.
Dependencies are inferred from the claim text.