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  • Charmasson, Henri. "Patents, Copyrights & Trademarks for Dummies." Wiley Publishing, Inc., 2004.
  • Pressman, David. "Patent It Yourself." Nolo, 2009. 14th Ed.
  • U.S. Patent and Trademark Office. Personal Correspondence. Jan. 21, 2011.
  • U.S. Patent and Trademark Office. "Provisional Application for Patent." Last modified July 4, 2009.http://www.uspto.gov/patents/resources/types/provapp.jsp

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