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<p>[QUOTE=&quot;desertgem, post: 2299743, member: 15199&quot;]The basic patents on computerized grading belong now to PCGS. You can find them on the appropriate government public databases. They have had them quite a while, and could have made it part of their laser scanning for identification, but did not publicly label or release. </p><p><br /></p><p>This patent data on google gives a large number or original patents granted, to find current owner if any, you would have to research further. Some go back to the 90&#039;s/</p><p><a href="http://www.google.com/patents/US5224176" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.google.com/patents/US5224176" rel="nofollow">http://www.google.com/patents/US5224176</a>[/QUOTE]</p><p><br /></p>

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