For More Information All business with the United States Patent and Trademark Office (USPTO or Office)

For More Information
All business with the United States Patent and Trademark Office (USPTO or Office) should be
transacted in writing. Be sure to include your full return address, including zip code. All
correspondence relating to patent matters should be addressed to:
Commissioner For Patents
P.O. Box 1450
Alexandria, VA 22313-1450
The principal location of the USPTO is:
U.S. Patent and Trademark Office
600 Dulany Street
Alexandria, Virginia
Questions of a general nature only can be answered by Patent Assistance Center telephone
service. Telephone numbers are: Toll Free - 800-PTO-9199 (800-786-9199) or 703-308-HELP
(703-308-4357).