human: What are the various options for filing a petition for expedited foreign filing license?
assistant: A petition for an expedited foreign filing license based on a pending patent application (37 CFR 5.14), or for material not related to any pending application (37 CFR 5.13), may be filed by:  (1) facsimile transmission; (2) regular mail; (3) hand-delivery to the Customer Service Window; or (4) the USPTO patent electronic filing systems (EFS-Web or Patent Center) if an application is on file.  Filing via facsimile transmission (fax) is highly encouraged.
Facsimiles must be sent to: 571-270-9959.
Hand delivery to Licensing and Review in the Knox Building is temporarily unavailable for so long as the USPTO headquarters campus remains closed to the public. Currently, hand deliveries may be made at the Customer Service Window in the Randolph Building, located at 401 Dulany Street, Alexandria, VA 22314.
Requests submitted by regular mail must be addressed to:
Mail Stop: L&R
Commissioner for Patents
P.O. Box 1450
Alexandria, VA 22313-1450
All licenses will be mailed to the appropriate correspondence address, and a courtesy copy may be provided by facsimile if such notification is requested.
If you have any questions about filing a petition for an expedited foreign filing license or the status of such a petition, please call 571-272-8203.