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1. United States Patent and Trademark Office. (2014). General information concerning patents. Retrieved from http://www.uspto.gov/patents-getting-started/general-information-concerning-patents#heading-2
A patent search can identify specific technological advances and inventions in the area of your topic. Citations provided in patents can lead you to additional sources and other related inventions. For additional information on patents please consult The United States Patent and Trademark Office's informational guide.
Not sure about what search terms to use? Try browsing the U.S. Patent and Trademark Office Classification System for patent subjects.