What is the difference between a patent attorney and a patent agent?
A patent attorney and a patent agent share the same USPTO registration and can both prosecute patent applications before the Office. The distinction is one credential: bar admission. That difference determines what each professional can do outside of USPTO proceedings.
What both roles share: USPTO registration
Both practitioners carry the same designation in the MPEP: a "patent practitioner" is a registered patent attorney or registered patent agent under 37 CFR 11.6. Their registration entitles them to practice before the Office only in patent matters.
That shared registration covers a substantial body of work, including preparing or prosecuting patent applications, consulting with clients in contemplation of filing, drafting specifications and claims, responding to office actions, and participating in PTAB proceedings such as inter partes review, post-grant review, and reexamination.
A client whose sole need is patent prosecution can receive equivalent USPTO-facing service from either a patent agent or a patent attorney.
The defining difference: bar membership
Under USPTO rules, "attorney or lawyer" means an individual who is an active member in good standing of the bar of the highest court of any State. A patent attorney is an individual who satisfies that definition, is either a U.S. citizen or an alien lawfully residing in the United States, and has additionally registered with the USPTO as a patent practitioner under 37 CFR 11.6(a). A patent agent is an individual who is not an attorney but who, on the same citizenship-or-lawful-residence basis, has registered with the USPTO as a patent practitioner under 37 CFR 11.6(b).
Registration as a patent agent does not require a law degree or state bar admission. A patent agent's professional authority before clients is bounded by their USPTO registration, which covers only proceedings before the Office. Patent attorneys, holding both a USPTO registration and an active state bar license, are licensed lawyers and can provide legal services to clients beyond the scope of their USPTO registration.
How each is registered
The registration pathway is nearly identical for both:
- Demonstrate satisfactory scientific and technical qualifications under 37 CFR 11.7.
- Pass the USPTO registration examination.
- Undergo a moral character investigation.
- File the required Data Sheet and Oath/Affirmation.
The fork comes at the registration step: an attorney submits a certificate of good standing issued within the past six months from the highest court of their state, and the USPTO records them as a patent attorney. A person who completes the same process without that bar certificate is recorded as a patent agent.
Technical qualifications: shared by both
Both roles require a technical or scientific background. The USPTO evaluates whether an applicant has the scientific and technical qualifications necessary to provide valuable service to patent applicants. A law degree does not substitute for the required technical background.
How to verify registration
The USPTO Office of Enrollment and Discipline maintains a searchable public roster of all registered practitioners. A search there confirms whether a specific person is registered as a patent attorney or a patent agent, and whether their registration is currently active. The current roster lists 38,335 active patent attorneys and 14,556 active patent agents.
One scope note: registration as a patent agent does not extend to trademark prosecution. A patent agent cannot file or prosecute trademark applications before the USPTO.
At a glance
| Task | Patent attorney | Patent agent |
|---|---|---|
| Drafting and filing a patent application | Yes | Yes |
| Responding to USPTO office actions | Yes | Yes |
| PTAB proceedings (IPR, PGR, reexam, reissue) | Yes | Yes |
| Legal services outside USPTO patent proceedings | Yes | No (outside registration scope) |
| Prosecuting a trademark application before the USPTO | Yes | No (absent additional authorization) |
A practical note
For pure patent prosecution, an experienced patent agent and an experienced patent attorney provide equivalent service before the USPTO. The choice matters most when the engagement extends beyond prosecution: when litigation risk needs a legal assessment, when a deal requires licensing counsel, or when freedom-to-operate advice is part of a diligence process. In those contexts, the patent attorney's bar license is the operative credential, not just the USPTO registration.