Assignments Recordation Branch (ARB)

Local: 571-272-3350
Fax: 571-273-0140

For help with following a new assignment or obtaining information on a pending assignment, questions on assignments, liens on patents, filing assignments, recordation forms, and trademark assignments. Assistance is available Monday through Friday (except federal holidays) from 8:30 a.m. to 5 p.m. ET.

571-272-3350 (local)