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<p>[QUOTE=&quot;desertgem, post: 690686, member: 15199&quot;]The two most recent posts on computer grading is this one by Doug</p><p><a href="http://www.cointalk.com/t42332/#post440257" class="internalLink ProxyLink" data-proxy-href="http://www.cointalk.com/t42332/#post440257">http://www.cointalk.com/t42332/#post440257</a></p><p>but his url of the dissertation by Rick A. Basset on computer grading is dead now and should be this</p><p><a href="http://www.rickbassett.com/pace/dissertation/Manuscript.pdf" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.rickbassett.com/pace/dissertation/Manuscript.pdf" rel="nofollow">http://www.rickbassett.com/pace/dissertation/Manuscript.pdf</a></p><p>which I have saved and read a couple of times.</p><p><br /></p><p><br /></p><p><br /></p><p>and also this post by myself in the post following Doug&#039;s</p><p><a href="http://www.cointalk.com/t42332/#post440412" class="internalLink ProxyLink" data-proxy-href="http://www.cointalk.com/t42332/#post440412">http://www.cointalk.com/t42332/#post440412</a></p><p><br /></p><p>which has this url:</p><p><a href="http://www.freepatentsonline.com/5220614.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.freepatentsonline.com/5220614.html" rel="nofollow">http://www.freepatentsonline.com/5220614.html</a></p><p><br /></p><p>Which is a patent for an <b>Automated coin grading system</b> ,1993 (and it is assigned to Guess who!&nbsp; Right !!! <b>&nbsp; :secret: PCGS.</b> </p><p><br /></p><p>This URL is very interesting in that it has references to other patents of similar claims, back to 1967 &quot;Silhouette coin grader&quot;, including 1989 &quot;Numismatic detector&quot; and 1990 &quot;Method and system for objectively grading and identifying coins&quot;.</p><p><br /></p><p>Since PCGS has held the patent since 1993 it would be interesting to know if they ever tried implementing it in real tests or if it was eventually discarded. Even holding this patent would discourage many TPGs from trying to implement it themselves, IMO.</p><p><br /></p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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