The United States Patent and Trademark Office (PTO or<unk>  is an agency in the United States Department of Commerce that issues patents to inventors and businesses for their inventions, and trademark registration for product and intellectual property identification.
The<unk>  is currently based in Alexandria, Virginia, after a 2006 move from the Crystal City, Virginia area of Arlington County, Virginia. A few offices remain in the Potomac Gateway complex at the southern end of Crystal City; these offices will move to Randolph Square, a brand new building in Shirlington Village, in 2009. Since 1991, the office has been fully funded by fees charged for processing patents and trademarks.
The<unk>  cooperates with the European Patent Office (EPO) and the Japan Patent Office (JPO) as one of the Trilateral Patent Offices. The<unk>  is also a Receiving Office, an International Searching Authority and an International Preliminary Examination Authority for international patent applications filed in accordance with the Patent Cooperation Treaty.
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