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Classes in the U.S. Patent Classification System - Dates Established

Classes in the U.S. Patent Classification System
Dates Established

Listed below are the current classes in the U.S. Patent Classification System and the date each class was established. This information is complete through 2009.




United States Patent and Trademark Office
This page is owned by Office of Patent Classification.
Last Modified: 1/3/2013 4:41:17 PM