Most inventors choose a patent attorney the way they choose a plumber: whoever answers first. That is a poor way to pick the person who will write the document defining what you own for twenty years.
The criteria are concrete. Most can be checked in an afternoon; the rest come out in the first conversation.
Registration Is the Floor, Not the Ceiling
Anyone who prepares or prosecutes a patent application for someone else before the USPTO must be registered to practice there. Registration requires a qualifying scientific or technical degree and a passing score on the USPTO registration examination. The USPTO's Office of Enrollment and Discipline keeps a public, searchable roster of registered practitioners. Search it. If the name is not there, stop.
Two kinds of people appear on that roster. A patent agent has passed the exam and may prepare and prosecute applications, but is not a lawyer and cannot advise on contracts, licensing, ownership disputes, or litigation. A patent attorney has passed the same exam and is also licensed by a state bar, so the same person can handle the assignment agreement, the license, and the question of whether you should file at all.
The Technical Background Has to Match
A patent application must describe the invention in enough detail that a person skilled in the field could build it, and the claims have to carve out what is new against everything that came before. The person drafting it needs to understand your technology well enough to know which details matter and which alternatives a competitor would reach for.
Registration only proves a technical degree of some kind. A chemist can be registered and still be the wrong choice for a machine learning pipeline.
Ask what fields they have drafted in, and how recently. Then run the real test: explain your invention and ask them to explain it back. If what comes back is your own words rearranged, they did not understand it. If it includes a question you had not considered, or an alternative you had not mentioned, you are talking to someone who can write the specification you need.
Find Out Who Actually Writes It
The person you meet is not always the person who drafts. At many firms a partner takes the call and an associate, a patent agent, or an outside contractor writes the specification and claims. Some firms send drafting offshore. Some lean on AI drafting tools with varying amounts of review.
None of that is automatically disqualifying, but you are entitled to know. Ask directly:
- Who will write the specification and the claims?
- Who will respond to office actions and talk to the examiner?
- Will anyone outside the firm touch the draft?
- If AI tools are used, who verifies the output and checks the citations?
- Will I review the full draft, including the claims, before it is filed?
The specification cannot be expanded after filing. Under 35 U.S.C. § 132, no new matter may be added, so whatever the drafter fails to describe on filing day is gone from that application for good. The skill of the person holding the pen matters more than the name on the letterhead.
What a Good First Call Sounds Like
A competent patent attorney spends the first conversation asking questions, not selling. Expect to be asked:
Have you disclosed it? A demo, a pitch without an NDA, a published paper, a website, a trade show, or an offer to sell starts a clock under 35 U.S.C. § 102. In the United States you have twelve months. Most other countries give you nothing. If this question does not come up early, that is a problem. The details are in What Happens If You Disclose Your Invention Before Filing.
What is actually new? Not what the product does. What it does differently from what exists, and why that was hard. An attorney who stays skeptical until a search comes back is doing the job. Skepticism costs them something. Enthusiasm is free.
Who built it, and did they sign anything? Co-founders, contractors, a prior employer, a university. Ownership questions are easier to fix before a filing than after.
What is the business? Who has the problem, how they solve it today, and what a patent would actually do for you. A patent that will never be enforced, on a product nobody has validated, is a certificate, not an asset.
Expect, in return, a straight answer about whether to file and which type of application fits. Fees should be confirmed in writing before any work begins, with a clear statement of what the quote covers. The patent cost guide explains what drives them.
The best signal in a first call is an attorney willing to tell you not to file. Someone who takes every matter that walks in is not evaluating your invention. They are processing it.
Red Flags
A guarantee. Nobody can promise allowance, a timeline, or claim scope. Examination is a negotiation with an examiner over prior art neither side has fully seen yet. Anyone who guarantees an outcome is either inexperienced or not being straight with you.
Excitement before a search. If someone is thrilled about your idea on the first call, you are not their client. You are their inventory. Invention promotion companies are required by federal law, 35 U.S.C. § 297, to disclose how many customers they have taken on and how many made money. Ask for that disclosure and read it.
"Patent pending" sold as the product. A filing is useful because of what it describes, not because of the label. A thin application filed fast gives you a phrase for your website and little else.
No questions about disclosure, ownership, or the market. Those are the questions that change the advice. An attorney who does not ask them is taking an order, not giving advice.
No written fee agreement. Whatever the structure, it belongs in writing before work starts, with what it covers and what it does not.
Pressure to sign today. Real deadlines exist, and a good attorney will tell you exactly what yours are. Manufactured urgency is different.
The Short Version
Verify registration on the USPTO roster and bar status with the state. Confirm the technical background matches your field by having them explain your invention back to you. Find out who holds the pen. Expect questions about disclosure, ownership, and the business before any talk of filing. Walk away from guarantees, enthusiasm without a search, and fees that are not in writing.
None of this is complicated. Most people skip it because the first call feels like an interview they are trying to pass. It is the other way around.
For how an application is written and examined, see patent prosecution. To talk through your invention, schedule a consultation.
Frequently Asked Questions
What is the difference between a patent attorney and a patent agent?
Both are registered to practice before the USPTO and can prepare and prosecute patent applications. A patent attorney is also licensed by a state bar and can advise on contracts, ownership, licensing, and litigation. A patent agent cannot practice law outside of USPTO proceedings.
How do I verify that someone is a registered patent attorney?
Search the USPTO's public roster of registered patent attorneys and agents, maintained by its Office of Enrollment and Discipline. For an attorney, also check the state bar's public records for license status and any discipline history.
Does my patent attorney need a degree in my exact field?
Not the exact field, but close enough to understand what is new about your invention and which alternatives a competitor would try. The practical test is to explain the invention and have the attorney explain it back to you with questions you had not considered.
What should I bring to a first consultation with a patent attorney?
A plain description of how the invention works, any drawings or prototypes, a list of everyone who contributed, and every date you disclosed, demonstrated, published, or offered it for sale. The dates matter most, because disclosure starts deadlines that cannot be extended.
This article is general educational information, not legal advice, and reading it does not create an attorney-client relationship. Patent law is fact specific and deadlines are unforgiving. For advice on your situation, schedule a consultation.