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Classification Orders Index (COI)

   Classification Orders Index (COI) 

  December 2012 


The Classification Orders Index contains changes to the U.S. Patent Classification System (USPCS)  resulting from classification orders that issued from 1976 through the present.  The Classification Orders Index is updated quarterly in March, June, September, and December.  Links to classes within the Classification Orders Index are below.

United States Patent and Trademark Office
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Last Modified: 3/14/2013 3:22:24 PM