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USPTO Fax Numbers: Patents (571) 273-8300, Trademarks & Assignments
Read More: USPTO Fax Numbers: Patents (571) 273-8300, Trademarks & AssignmentsCentral USPTO patent fax (571) 273-8300, trademark fax (571) 273-8950, assignments (571) 273-0140. Full department directory plus what you can’t fax.