306.02 Fax Machines Designated to Accept Relevant Trademark Documents
The fax machines that are designated to accept trademark documents are attended between the business hours of 8:30 a.m. and 5:00 p.m., Eastern Time, Monday through Friday, excluding Federal holidays within the District of Columbia.
Submissions by fax should be transmitted to the location for which they are intended. A USPTO Contacts List, which includes fax numbers, is available on the USPTO website at http://www.uspto.gov, and appears periodically in the Official Gazette. In addition, questions about fax numbers may be directed to the Trademark Assistance Center at (571) 272-9250 or (800) 786-9199.
The USPTO does not formally acknowledge receipt of documents transmitted by fax, but USPTO fax machines will usually confirm to the sending unit that the transmission is complete.
Each fax machine location in the USPTO maintains a log comprising a collection of daily activity sheets recording all fax transmissions received. These logs can be used as evidence of receipt in the USPTO, and may be used to reinstate applications and registrations. See 37 C.F.R §2.64; TMEP §1712. The individual activity report that pertains to a particular transmission received in the USPTO is kept with the correspondence.