If you live outside the United States and have a U.S. patent application or a U.S. patent, a rule that took effect on July 20, 2026 now requires you to be represented by a USPTO-registered patent practitioner in most correspondence with the USPTO. The USPTO calls it the U.S. Counsel Rule. It applies based on the date a paper is submitted, not the date your application was filed, so older applications are not grandfathered. A registered patent agent satisfies the requirement — you do not need a patent attorney.
Lauren Edwards-Williams is a USPTO Registered Patent Agent, Registration No. 83,695, and the founder of Legacy Patents LLC in Scottsdale, Arizona. Legacy Patents provides U.S. patent representation for foreign-domiciled applicants, subject to the scope and circumstances of the matter.
This is the full guide to the rule. For the shorter summary we published when it took effect, see Filing From Outside the U.S.? You Now Need a U.S. Patent Practitioner.
What changed on July 20, 2026?
The USPTO amended its Rules of Practice in Patent Cases so that patent applicants and patent owners whose domicile is not located within the United States or its territories must be represented by a registered patent practitioner. The change sits in 37 CFR 1.31(a)(2). The final rule, Required Use by Foreign Applicants and Patent Owners of a Patent Practitioner, was published at 91 Fed. Reg. 13510 on March 20, 2026 and took effect on July 20, 2026.
In practice, the rule is enforced through signatures. Where representation is required, papers submitted to the USPTO have to be signed by a registered patent practitioner. The USPTO's guidance names examples of the papers this reaches:
- Amendments
- Replies, including replies to USPTO notices
- Application Data Sheets
- Micro entity certifications
- Information Disclosure Statements
- Petitions
- Issue fee transmittals and other submissions in the application
The consequence of getting this wrong is not subtle. According to the USPTO's July 17, 2026 memorandum to USPTO personnel, an improperly signed amendment or reply will not be entered, an improperly signed Information Disclosure Statement should not be considered, and an improperly signed Application Data Sheet is treated as a transmittal letter. Instead of an examination on the merits, the applicant may receive a Notice of Non-Compliant Amendment — while the clock on the original deadline keeps running.
Two further points from that memorandum are easy to miss. Where representation is required, examiner interviews must include a registered practitioner, including interviews held to authorize an examiner's amendment. And being required to have representation does not mean a Power of Attorney must be filed; a practitioner may act under 37 CFR 1.34.
What it costs you if a paper goes in unsigned
The knock-on effects are worse than "the USPTO asks you to fix it", and some are not fixable in that application at all. From the final rule and the USPTO's guidance:
- Your priority claim may not take effect. An improperly signed Application Data Sheet is treated as a transmittal letter, and the USPTO has stated that a benefit or priority claim presented in it will not be entered. Depending on timing, restoring it can require a petition for a delayed benefit claim under 37 CFR 1.78 or a delayed priority claim under 37 CFR 1.55. If you were relying on an earlier provisional or a foreign filing, that is the claim at risk.
- Amendments and replies are not entered, so they never reach your examiner — and the clock on your response deadline keeps running.
- An Information Disclosure Statement should not be considered.
- Micro entity status cannot be established, because the micro entity certification must be signed by a registered patent practitioner. Paying the correct fees later can bring a surcharge.
- Some opportunities cannot be recovered in that application. A nonpublication request and a Track One prioritized examination request must be submitted with the original filing. The USPTO has stated that where the requirements are not met, it is not possible to meet them later in that application.
What the rule does not reach
The USPTO has confirmed two carve-outs in its U.S. Counsel Rule FAQs:
- Maintenance fee payments. Payment by someone other than the patentee is already provided for by 37 CFR 1.366(a), and the USPTO will not consider the domicile of a patent owner when accepting maintenance fees.
- Recordation of assignment documents. Recording an assignment does not place the document in the application file, so no new signature requirement applies.
Does this apply to patent applications filed before July 20, 2026?
Yes. Applications are not grandfathered based on their filing date. This is the most common misunderstanding about the rule, and the USPTO answers it directly in its FAQs: the rule applies based on the submission date of the paper, and the original filing date of an application does not establish an exception.
A concrete example. An inventor living in Manchester, England filed a U.S. non-provisional application in 2024 without a practitioner, and an Office Action issues in October 2026. The application keeps its 2024 filing date. But the reply to that Office Action is a paper submitted after July 20, 2026, so it must be signed by a registered patent practitioner to be entered.
The USPTO has also confirmed the reassuring half of this: an existing application does not become abandoned merely because no registered practitioner is associated with it. What changes is that representation is required for future submissions. An application still goes abandoned only in the ordinary way — by failing to file a proper, timely reply.
Separately, the rule does not change how filing dates are granted. An application received without a signature, or with an improper signature, is still accorded a filing date under the conditions in 37 CFR 1.53. Further action may then be needed on the papers that were not properly signed.
Who counts as "foreign-domiciled"?
Domicile is not citizenship. The USPTO defines domicile as the permanent legal place of residence of a natural person, or the principal place of business of a juristic entity. A U.S. citizen living permanently in Berlin is foreign-domiciled for this purpose; a German citizen permanently resident in Arizona is not. The USPTO does not collect information on the citizenship of patent applicants at all.
Three details decide most real cases.
1. The rule follows the applicant, not the inventor
The rule attaches to the applicant, as that term is defined in 37 CFR 1.42. Where the inventors are not the applicant, the inventors' domicile is not relevant. Where an assignee is not the applicant, the assignee's domicile is not relevant either. The applicant of record is shown on the most recent filing receipt.
2. One foreign-domiciled party is enough
If two or more people or entities together make up the applicant, representation is required if any one of them is domiciled outside the United States or its territories. The USPTO's own illustration uses joint inventor-applicants, one in South Carolina and one in England: that application requires representation.
3. Companies were already covered
All juristic entities — companies, LLCs, universities, organizational assignees — have been required to be represented by a registered patent practitioner since September 16, 2012, under the America Invents Act implementing rules. The amended 37 CFR 1.31 keeps that requirement. If your applicant is a company, the July 2026 change did not alter your position.
Two more points the USPTO settled when it made the rule final. Provisional applications are not carved out — a commenter asked for that exception and the Office declined, saying the effect on provisionals was expected to be minimal. And an exception for mixed-domicile applicant groups was also requested and rejected, on the reasoning that it would create an incentive to manipulate how the applicant is identified.
The rule also reaches patent owners, not only applicants. If you own an issued U.S. patent and your domicile is outside the U.S. or its territories, papers filed in that patent need a registered practitioner's signature too.
One useful detail: U.S. territories count as domestic. The USPTO's published examples specifically note that an applicant in Puerto Rico is domiciled in the U.S. for this purpose.
Where the USPTO concludes that representation is required and it is missing, it may mail a notice — sometimes a Notice to File Missing Parts stating that the Application Data Sheet is not properly signed. If you believe a domicile determination is wrong, the USPTO provides a route to traverse it, using the document code DOMICILE.TRV when filing electronically.
Do I need a patent attorney, or can I use a patent agent?
Either. The USPTO requires a registered patent practitioner, and that term covers registered patent agents as well as registered patent attorneys. What you cannot do is hand the matter to a general U.S. lawyer who is not on the USPTO register. The USPTO FAQs put it plainly: a foreign-domiciled applicant must use a registered patent practitioner, and the practitioner's own location is irrelevant — there is no requirement or limitation regarding the domicile of the practitioner.
The distinction between the two credentials is narrower than most people expect.
| Registered patent agent | Registered patent attorney | |
|---|---|---|
| Passed the USPTO registration examination (the "patent bar") | Yes | Yes |
| Required technical or scientific qualification | Yes | Yes |
| Listed on the USPTO register of patent practitioners | Yes | Yes |
| May prepare, file and prosecute U.S. patent applications | Yes | Yes |
| Satisfies the July 2026 representation requirement | Yes | Yes |
| Also licensed to practice law generally — litigation, contracts, advice outside patent prosecution | No | Yes |
Put simply: a patent agent is a specialist registered to practise patent law before the USPTO. A patent attorney holds that same registration plus a broader law licence. If what you need is a U.S. patent application prepared, filed and prosecuted, both are qualified to act. If you also need litigation or general legal advice, that is work for an attorney. Our longer explainer covers this in more depth: Patent Attorney vs. Patent Agent: What's the Difference?
Lauren Edwards-Williams is a USPTO Registered Patent Agent, Registration No. 83,695. She is not a U.S. attorney and does not provide general legal services. Registration can be confirmed on the USPTO's register of active patent practitioners, maintained by its Office of Enrollment and Discipline. The USPTO itself does not recommend or select practitioners.
What if I already filed my U.S. patent application myself?
This is a common position, and it is workable. You can engage a registered patent practitioner at any point in the life of an application. There is no rule that the practitioner who files must be the one who drafted, and no rule that you must start over.
What usually happens first is a review. Legacy Patents can look at the pending application and the prosecution record — what was filed, what the USPTO has issued, which deadlines are live — and then propose a scope of representation that fits. That might be a single reply to an outstanding notice, or ongoing prosecution through to allowance or abandonment.
Two practical notes. First, check your deadlines before anything else; a rule change does not extend a due date. Second, the applicant of record on your most recent filing receipt is what the USPTO looks at to decide whether representation is required, so read that document carefully.
What if my patent application is already written?
You do not have to buy drafting from scratch in order to work with a U.S. practitioner. Legacy Patents offers pre-filing review of patent applications that have already been drafted, which is often the right fit for a foreign-domiciled applicant who already has a complete draft in hand.
Drafts arrive from all sorts of places, and all of these are ordinary:
- Applications the inventor drafted personally
- Drafts prepared with AI tools or online patent-drafting software
- Applications prepared by patent counsel in the applicant's home country
- Applications prepared by another service provider
- Applications prepared internally by a company's engineering or IP team
Where agreed, review and U.S. filing can be scoped together. A review does not guarantee patentability or allowance, and it will not always turn a thin draft into something ready to file without further work — if substantial redrafting is needed, that is scoped and quoted separately. Full detail here: Already Written Your Patent Application? Why a Pre-Filing Review Can Be Worth Considering.
What if I receive a Notice to File Missing Parts?
A Notice to File Missing Parts is generally issued when an application is entitled to a filing date but something required for a complete application is missing or deficient. It is not a rejection of your invention — it comes out of application processing, not substantive examination.
Foreign-domiciled applicants should read these notices closely for a second reason. As noted above, the USPTO may use a Notice to File Missing Parts to flag that an Application Data Sheet was not properly signed, which is how a representation problem often first surfaces.
Legacy Patents handles Notices to File Missing Parts: reviewing the notice and the application file, identifying what the USPTO is actually asking for, and preparing the reply within the agreed scope. Our full guide is here: Received a USPTO Notice to File Missing Parts? What It Means and What to Do Next.
Can Legacy Patents work with my patent attorney in my home country?
Yes, and this is a normal arrangement. Home-country counsel may have prepared the original application, a corresponding national filing or a PCT application, and may hold the client relationship. What they may not have is a USPTO-registered practitioner to sign and prosecute the U.S. matter.
Legacy Patents can act as U.S. practitioner alongside foreign counsel — reviewing the U.S. version of the application, handling U.S. filing, and managing correspondence with the USPTO — within an agreed scope. U.S. drafting conventions differ from those in many other jurisdictions, particularly around claim format and written-description support, which is a large part of why a U.S.-specific review is worth doing before filing rather than after.
If you are still deciding how to enter the U.S. — direct filing, Paris Convention priority or the PCT national stage — our earlier article on filing a patent in the U.S. as a foreign applicant walks through the options and the priority deadlines.
How much does a U.S. patent practitioner cost for a foreign applicant?
Legacy Patents publishes flat-fee starting prices rather than quoting hourly. Current published pricing:
| Service | Starting price | Notes |
|---|---|---|
| Prior art search | From $700 flat fee | Optional patentability analysis and consultation: +$500 ($1,200 for search and analysis together) |
| Provisional application | From $1,200 | Software inventions from $1,500; USPTO fees separate |
| Non-provisional application | From $4,200 | Software inventions from $5,000; USPTO fees separate |
| Design patent application | From $2,300 | USPTO fees separate |
Four things worth understanding about how those numbers behave:
- USPTO government fees are separate. Filing, search, examination, excess claim and issue fees are set by the USPTO and change periodically; current amounts are on the USPTO fee schedule. Many independent inventors and small companies qualify for reduced small or micro entity fees — see our guide to micro entity status.
- Complexity affects drafting fees. The published figures are starting points. Technical density, the number and structure of the claims and the state of the disclosure all move the final number.
- Existing applications and live USPTO notices are quoted after review. Taking over a pending matter means reading the record first, so the quote follows the review rather than the other way round.
- You get the quote before you commit. The fee is agreed in writing before work begins.
For a broader view of what a U.S. patent costs end to end, including government fees, see How Much Does It Cost to Get a Patent?
Already have an application or a USPTO notice? You do not necessarily need to start over. Legacy Patents can review the existing matter and determine the appropriate next step.
A sensible order of operations
If you are foreign-domiciled and working out where you stand, this sequence answers most of it:
- Find your most recent filing receipt and read who is listed as the applicant, and where they are domiciled. That is what the USPTO uses.
- Check whether anything is due. A deadline on an Office Action or a notice governs everything else.
- Decide what you actually need — a one-off reply, a pre-filing review, or ongoing prosecution.
- Engage a registered patent practitioner in time for them to prepare and sign the paper before it is due.
If your invention has not been filed anywhere yet, the earlier questions still apply: whether the invention is likely patentable, and whether to start with a provisional or a non-provisional application. A prior art search is usually the least expensive way to find out whether the rest is worth doing, and our article on whether a patent search is worth it explains when it is and is not.
Frequently asked questions
Do foreign inventors need a U.S. patent attorney?
No. The USPTO requires a registered patent practitioner, which includes both registered patent attorneys and registered patent agents. A foreign-domiciled applicant may choose either. What the USPTO does not allow is using a general U.S. lawyer who is not on the USPTO register of patent practitioners.
Can a patent agent represent a foreign patent applicant?
Yes. A USPTO-registered patent agent is a registered patent practitioner and may represent a foreign-domiciled applicant before the USPTO in patent matters. Lauren Edwards-Williams of Legacy Patents LLC is a USPTO Registered Patent Agent, Registration No. 83,695.
What changed on July 20, 2026?
The USPTO amended 37 CFR 1.31 so that patent applicants and patent owners whose domicile is not within the United States or its territories must be represented by a registered patent practitioner. The final rule was published at 91 Fed. Reg. 13510 on March 20, 2026 and took effect July 20, 2026. Where representation is required, papers submitted to the USPTO must be signed by a registered patent practitioner.
Who is considered foreign-domiciled by the USPTO?
The USPTO defines domicile as the permanent legal place of residence of a natural person, or the principal place of business of a juristic entity. Domicile is not determined by citizenship. The USPTO normally reads domicile from the residence or mailing address on the Application Data Sheet or the inventor oath or declaration, and the applicant of record appears on the most recent filing receipt.
Does the new USPTO rule apply to applications filed before July 20, 2026?
Yes. The USPTO has stated that applications are not grandfathered based on their filing date. The rule applies to papers submitted on or after July 20, 2026, regardless of when the application was originally filed.
Are older patent applications grandfathered?
No. The USPTO FAQ on the U.S. Counsel Rule answers this directly: the rule applies based on the submission date of the paper, and the original filing date of an application does not establish an exception.
I filed my U.S. patent application myself before July 20, 2026. What happens now?
The USPTO has stated that an existing application will not become abandoned simply because no registered practitioner is associated with it. However, if the applicant is foreign-domiciled, representation by a registered patent practitioner is required for future submissions, including any reply, amendment, information disclosure statement, issue fee transmittal or response to a notice.
Does the rule apply to provisional patent applications?
Yes. A commenter asked the USPTO to exclude provisional applications and the Office declined, stating that the effect of the representation requirement on provisionals was expected to be minimal. A foreign-domiciled applicant filing a provisional is covered.
Does the rule apply to patent owners as well as applicants?
Yes. Amended 37 CFR 1.31 covers a patent owner where the domicile of at least one of the parties identified as the patent owner is not within the United States or its territories. Papers filed in an issued patent need a registered practitioner’s signature, with the exception of maintenance fee payments and assignment recordation.
What happens to my priority claim if my Application Data Sheet is not properly signed?
An improperly signed Application Data Sheet is treated as a transmittal letter, and the USPTO has stated that a benefit or priority claim presented in it will not be entered. Depending on timing, restoring the claim may require a petition for a delayed benefit claim under 37 CFR 1.78 or a delayed priority claim under 37 CFR 1.55.
Can I hire a U.S. patent agent instead of a patent attorney?
Yes, for patent matters before the USPTO. Registered patent agents and registered patent attorneys sit the same USPTO registration examination and both may represent applicants before the Office. Patent attorneys are additionally licensed to practice law and can provide broader legal services such as litigation and contracts. For preparing, filing and prosecuting a patent application, either may act.
Can a UK inventor use a U.S. patent agent?
Yes. The USPTO has stated there is no requirement or limitation regarding the domicile of the practitioner, so a UK-domiciled applicant may be represented by any registered patent practitioner, including a registered patent agent.
Can a European inventor use a U.S. patent agent?
Yes. Applicants domiciled anywhere outside the United States and its territories may be represented by any USPTO-registered patent practitioner, whether that practitioner is a registered patent agent or a registered patent attorney.
Can Legacy Patents represent international inventors?
Legacy Patents LLC provides U.S. patent representation for foreign-domiciled applicants, subject to the scope and circumstances of the matter. Work is handled remotely by video call, phone and email.
Does my U.S. patent practitioner need to be located in my state or country?
No. The USPTO has stated that there is no requirement or limitation regarding the domicile of the practitioner. What matters is that the practitioner is on the USPTO register of patent practitioners.
Can everything be handled remotely?
Yes. U.S. patent applications are filed and prosecuted electronically with the USPTO, and Legacy Patents works with clients remotely by video call, phone and email.
Can Legacy Patents take over my existing U.S. patent application?
In many cases, yes. Legacy Patents can review a pending application and its prosecution record and then propose an appropriate scope of representation. Acceptance depends on the specific matter, including live deadlines, the current record and any conflicts.
Can Legacy Patents work with my foreign patent attorney?
Yes. It is common for a firm in the applicant’s home country to have prepared the original drafting while a USPTO-registered practitioner handles the U.S. filing and prosecution. Legacy Patents can work alongside home-country counsel within an agreed scope.
My application is already drafted. Can Legacy Patents review and file it?
Yes. Legacy Patents offers pre-filing review of patent applications that have already been drafted, and review and U.S. filing can be scoped together where appropriate. A review does not guarantee patentability or allowance, and revisions may be recommended before filing.
I received a USPTO notice. Can Legacy Patents handle it?
Legacy Patents handles USPTO correspondence including Notices to File Missing Parts and Office Actions, subject to reviewing the notice and the application record and agreeing a scope of work. Send the notice and the application number to start that review.
Can Legacy Patents handle a Notice to File Missing Parts?
Yes. Legacy Patents assists applicants with USPTO Notices to File Missing Parts, including reviewing what the notice identifies as missing or deficient and preparing the reply within the agreed scope.
How much does a U.S. patent agent cost?
Legacy Patents publishes flat-fee starting prices: prior art searches from $700, provisional applications from $1,200 (software inventions from $1,500), non-provisional applications from $4,200 (software inventions from $5,000) and design patent applications from $2,300. USPTO government fees are separate. Final fees depend on the technology and the complexity of the matter.
Does Legacy Patents offer flat fees?
Yes. Legacy Patents works on flat or clearly defined fees for its published services, subject to the scope and complexity of the matter. Work on an existing application or an existing USPTO notice is quoted after a review of the record.
Are Legacy Patents prices published online?
Yes. Starting prices for prior art searches, provisional applications, non-provisional applications and design patent applications are published on the Legacy Patents website, with USPTO fees listed separately.
Who will actually work on my application?
Lauren Edwards-Williams works with clients directly. Legacy Patents is a boutique practice, and clients are not passed to junior associates.
What is the USPTO registration number for Lauren Edwards-Williams?
Lauren Edwards-Williams is a USPTO Registered Patent Agent, Registration No. 83,695. Registration can be confirmed through the USPTO Office of Enrollment and Discipline register of active patent practitioners.
Talk to a USPTO-registered patent agent
Legacy Patents LLC is a boutique patent practice in Scottsdale, Arizona, founded by Lauren Edwards-Williams, a USPTO-registered patent agent, USPTO Registration No. 83,695. Clients work with Lauren directly rather than being passed to junior associates, and matters are handled remotely by video call, phone and email for clients across the United States and internationally.
Book a free 30-minute consultation to talk through your application, your deadline and what representation would involve. If you are holding a USPTO notice, send it along with your application number so the position can be reviewed properly before the call.
This article is general information about USPTO procedure, not legal advice, and it does not create a practitioner-client relationship. Whether representation is required in your particular application depends on that application's record. USPTO rules change: verify current requirements against the USPTO's U.S. Counsel Rule page and its FAQs. No outcome before the USPTO is guaranteed.