The Bureau of patent and trade show in the United States (to form the acronym: PTO or USPTO) is an agency of the Ministry of Commerce of the United States of America, which is in the field of issuance of the certificate of patent to inventors, etc. registered trademarks for products and identify and to intellectual property activities.

the headquarters of the agency in 2006, change is from Arlington, Virginia to Alexandria, Virginia., Virginia, was moved.

The Bureau of patent and trade show United States plus the Office of Tibet, the invention of Europe and the Directorate of patent, Japan, forming the trilateral patent.