Online update classification

United States Patent and Trademark Office, www.uspto.gov (all accessed August 9, 2010). Official Web site of the U.S. Patent and Trademark Office. Recently redesigned to highlight patent and trademark searching along with services for inventors. Also available online is the U.S. Manual of Classification, www.uspto.gov/web/patents/classification/, listing class schedules and linked classification definitions. This is updated regularly. 

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