When to hire a patent agent, and how to check oneReviewed 9 November 2026
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Glossary

Patent agent
A non-lawyer registered by the USPTO to prepare and prosecute patent applications.
Patent attorney
A lawyer admitted to a state bar who has also passed the patent bar and is registered with the USPTO.
Registration number
The number the USPTO assigns to each registered patent attorney and agent; it can be checked in the USPTO's practitioner search.
OED
The USPTO's Office of Enrollment and Discipline, which approves exam applications, registers practitioners and handles discipline.
Patent prosecution
Preparing, filing and arguing a patent application before the USPTO until it is granted or abandoned.
Office action
An examiner's written decision on an application, to which the applicant replies.
USPTO
The United States Patent and Trademark Office.