Patent rights · Europe and the United States
Who Owns an Invention? Inventorship, Patent Ownership and the Right to File
Being named as an inventor is not the same as owning a patent. An employer may own patent rights without becoming the inventor, and a person or company may be permitted to file even when an inventor does not sign the application. Cross-border disputes must separate these questions before deciding what can be challenged, where and on what evidence.
Start by separating the concepts
One invention can involve three different legal questions
Many disputes become confused because the words “inventor”, “applicant” and “owner” are treated as if they describe the same role. They do not.
Who is the inventor?
Inventorship concerns the natural person or people who made the legally relevant creative contribution to the invention. It is not awarded by job title, seniority, funding responsibility or ownership of the laboratory.
Who had the right to file?
The right to apply may belong to the inventor, an employer, an assignee or another successor in title. The answer depends on the relevant patent law, employment law, contracts and the timing of any transfer.
Who owns the application or patent?
Ownership may change through a written assignment, corporate succession, inheritance or a rule governing employee inventions. A patent register is important evidence, but an entry may not finally resolve every title dispute.
Core principle: a person may remain correctly named as an inventor after assigning all economic rights. Conversely, being listed as an applicant or patent owner does not make a company or manager an inventor.
The human contribution
Who qualifies as an inventor?
Inventorship follows the substance of the claimed invention, not the organisation chart. In the United States, the central question is contribution to the conception of claimed subject matter. A person who merely states a desired result, follows instructions, performs routine tests or supervises a project may not qualify without a contribution to the inventive concept.
Joint inventors do not need to work at the same time, in the same place or contribute equally. A contribution to at least part of the claimed invention may be enough. The inventor list may therefore need to be reconsidered when patent claims are materially amended.
European practice also requires the inventor to be a natural person. The European patent application must designate the inventor, and the inventor has a right to be mentioned. That personal recognition is distinct from the transferable economic right to the application or patent.
USPTO guidance on inventorshipEuropean Patent Convention and national law
The right to a European patent
Europe does not have one universal rule deciding every employee-invention and ownership dispute. The European Patent Convention supplies the filing framework, but national law can determine who is entitled to an employee invention.
| Issue | European framework | Practical consequence |
|---|---|---|
| Initial entitlement | The right to a European patent belongs to the inventor or successor in title. | A non-inventor applicant should be able to explain the legal origin of its entitlement. |
| Employee invention | Entitlement is determined under the law identified by the employment rule in the Convention. | The employee’s country of main employment and the relevant employer establishment can matter. |
| EPO procedure | In EPO proceedings, the applicant is deemed entitled to exercise the right to the patent. | Acceptance of a filing is not a final judicial ruling that the applicant owns the invention. |
| Inventor designation | The application must name the inventor and state the origin of the right when the applicant is not the inventor. | Inventorship recognition and ownership documentation should be checked separately. |
| Wrong applicant | After a final entitlement decision, the entitled person may have procedural options concerning the European application. | Proceedings before the EPO may be stayed while a competent national forum decides entitlement. |
A Czech employee-invention example
Under Czech patent law, where an invention is created to fulfil an employment task, the right to the patent generally passes to the employer unless agreed otherwise. The inventor’s personal right to authorship is not affected. The law also provides a framework for notification, the employer’s exercise of the right and appropriate remuneration, including possible later adjustment.
This is an example, not an EU-wide rule. Another country’s employment law may produce a different result.
Transfers before the EPO
A pending European patent application can be transferred. For EPO registration, the transfer must be supported by written evidence and the relevant assignment document must be signed by the parties. Registration controls who may act before the EPO, but underlying disputes about authority or title may still require determination under the applicable law.
Do not wait for grant
If entitlement is genuinely disputed, delay can affect procedural options, evidence and commercial leverage. A review should identify the national forum, any available request to stay EPO proceedings, the current applicant and the status of each family member.
Read the EPO rule on entitlementUS patent law
Inventorship, filing authority and ownership in the United States
US procedure also separates the identity of the inventor from the identity of the applicant and owner. The documents must be analysed for what each one actually does.
The named human contributor
A US non-provisional application must identify each inventor of the claimed invention. Inventorship errors can sometimes be corrected during prosecution or after grant, but they should never be treated as a clerical detail.
The person permitted to file
An assignee, a person to whom the inventor is obliged to assign, or in limited circumstances a person with sufficient proprietary interest may file. The patent may be granted to the real party in interest.
The holder of transferable rights
US patent applications and patents are personal property. A transfer of a patent interest must be made in writing. Ownership may be split if not every joint inventor transfers their interest.
An inventor’s declaration is not the same as an assignment
The oath or declaration addresses inventor identity and authorisation of the application. An assignment transfers ownership. A power of attorney authorises a representative. A substitute statement can be used in defined circumstances when an inventor cannot or will not execute the declaration. These documents have different legal functions and should not be conflated.
USPTO recordation is important, but not conclusive
Recording an assignment gives public notice and can protect against later purchasers. The USPTO expressly states that recordation is not itself a determination that the document is valid or that it had the asserted effect on title. A contract or ownership dispute may require a court to decide governing law, execution, authority, conditions and chain of title.
USPTO guidance on the effect of recordationPatent families are territorial
A US filing is not simply an “extension” of a European patent
Patent rights are territorial. Protection in the United States normally requires a US application, whether filed directly, with a priority claim, or through the US national phase of an international PCT application. The PCT streamlines filing, search and timing, but patents are still granted by national or regional offices.
Related applications may share a priority claim and technical disclosure, yet they remain distinct legal rights. The US application must satisfy US requirements for inventorship, applicant status, declarations and ownership. A European assignment does not automatically answer every question about a later US family member; the wording must be checked to see which future, foreign, divisional, continuation or national-phase rights it covers.
For the same reason, a dispute over a European application does not automatically cancel a US patent, and a decision by one patent office may not resolve an employment or title dispute in another jurisdiction.
WIPO overview of the PCT and national phaseResearchers, employees and consultants
Employment does not erase inventorship — but it may change entitlement
The employer–inventor relationship must be analysed separately for each applicable country and each relevant contract.
| Question | Europe | United States |
|---|---|---|
| Who is named inventor? | The natural person or people who made the inventive contribution; employer ownership does not replace them. | The natural person or people who contributed to conception of the claimed subject matter. |
| Who owns? | May follow national employee-invention law, contract, assignment or succession. | Often turns on written assignment language, an obligation to assign, applicable state law and sometimes equitable doctrines. |
| Does employment alone decide? | No single EU-wide answer. The relevant national rule must be identified. | Not safely. The employment and invention-assignment documents must be read under the governing law. |
| Can compensation be due? | Some national systems provide statutory employee-inventor remuneration or later adjustment. | Compensation usually depends on contract, employer policy, collective arrangements and applicable employment law. |
| Who decides a dispute? | Often a national court or competent national body; the EPO handles the procedural consequences of a final entitlement decision. | USPTO procedures may correct records or inventorship, while ownership and contract disputes may require a court. |
Consultants and academic collaborators require special care. A person may perform the same technical work as an employee without being covered by the same statutory transfer rule. Sponsored research agreements, university policies, secondments, joint-development contracts and funding terms can change the result.
Economic rights
Inventorship, ownership and compensation are separate claims
An inventor may be correctly named and still dispute whether the employer acquired the patent right. An employer may validly own the patent while still owing statutory or contractual remuneration. A payment dispute does not necessarily undo an assignment, and a valid assignment does not necessarily eliminate a compensation right.
The calculation may depend on the applicable employee-invention statute, the technical and commercial value of the invention, the employer’s contribution, contractual formulas, internal policies and later exploitation. In cross-border employment, even identifying the governing law can be contested.
Patent offices generally are not substitutes for employment courts or civil courts. A challenge should be directed to the forum that can grant the desired remedy: correction of inventor designation, recognition of title, transfer of an application, contractual payment, statutory remuneration, damages or an injunction.
Preserve first, argue second
Documents needed for a serious ownership or inventorship review
Send a chronology and a controlled document set after a conflict check. Avoid forwarding privileged communications from former counsel unless their status and relevance have been considered.
Technical creation record
Invention disclosures, lab notebooks, source files, drawings, prototypes, test results, drafts and dated correspondence showing each contribution.
Employment and project record
Employment, consultancy, secondment, funding, research, collaboration and joint-development agreements, plus relevant policies.
Transfer record
Assignments, obligations to assign, powers of attorney, declarations, substitute statements, board authorities and corporate succession documents.
Patent-family record
Priority applications, PCT papers, European and US files, current claims, inventor designations, register extracts and recorded assignments.
Compensation record
Notifications, employer responses, remuneration decisions, payment evidence, royalty policies, valuations and later commercial-use information.
Procedural record
Office communications, decisions, pleadings, hearing records, appeal notices, service dates and every currently running deadline.
Do not alter or reconstruct the historical record
Preserve native files, metadata and complete email threads. Create a separate working chronology, but do not rewrite old records or add retrospective signatures without legal advice. Evidence integrity can be as important as the technical merits.
Choose the body that can grant the remedy
EPO, national courts, USPTO and WIPO have different roles
A cross-border complaint cannot simply be “escalated internationally”. Jurisdiction follows the right, territory, procedural stage and remedy.
EPO and national forums
The EPO processes the European application, inventor designation and registered transfers. A competent national forum may need to decide substantive entitlement, employment rights or contract disputes. The EPO can give procedural effect to a final entitlement decision.
USPTO and US courts
The USPTO provides procedures for declarations, applicant status, recordation and correction. It does not treat assignment recordation as a final adjudication of title. Contract and ownership disputes may need court proceedings under the applicable law.
WIPO and the PCT
WIPO administers the PCT and offers consensual dispute-resolution services. It is not a general appellate court that reverses national employment, patent-office or civil-court decisions. A PCT filing also does not itself grant a worldwide patent.
UPC caution: the Unified Patent Court is a specialist forum for disputes within its patent jurisdiction, particularly infringement and validity of relevant European and Unitary Patents. It should not be assumed to replace national courts for every employment, compensation or initial-entitlement claim.
A proportionate first engagement
How a complex Europe–US patent-rights case should be assessed
A reliable opinion requires more than reading one assignment or one patent register entry. The first stage should define the facts, applicable laws, forums and realistic remedies before expensive litigation is considered.
Conflict check and urgent deadlines
Identify the parties without sending substantive confidential documents, then confirm court, office, appeal and response deadlines.
Chronology and patent-family map
Connect the invention’s development, employment events, disclosures, filings, assignments and decisions across Europe, the PCT and the United States.
Claim-based inventorship review
Map evidence of technical contributions to the claims at the relevant time and identify additions, omissions or disputed joint inventors.
Title, employment and assignment analysis
Determine the potentially applicable laws and review the chain of title, obligations to assign, execution, authority, scope and compensation provisions.
Forum, remedy and budget options
Separate administrative corrections, negotiations and focused applications from court claims. Define who must provide US or other national-law advice and offer a staged scope.
Why complex litigation cannot be quoted like a patent filing
A filing task has a defined document, authority and deadline. An entitlement or compensation dispute may require document review, technical claim analysis, choice-of-law research, factual witness evidence, coordination with national counsel and procedural risk assessment. A responsible quote therefore needs an initial scoped review. Pro bono, deferred-payment or success-based arrangements cannot be assumed and depend on the provider, jurisdiction, professional rules, merits and available capacity.
Related Bauer IP services
European patent prosecution and dispute support
Frequently asked questions
Inventorship and patent ownership FAQs
Can I be the inventor but not own the patent?
Yes. Inventorship identifies the natural person who made the inventive contribution. Ownership can pass to an employer, assignee or successor in title while the inventor remains named.
Can an employer file a US patent application if an inventor does not sign?
Potentially. US law permits filing by an assignee, a person to whom the inventor is obliged to assign, or in limited cases a person with sufficient proprietary interest. A substitute statement may be available in defined circumstances. The underlying obligation and documents must be checked.
Does the absence of a witness or notary invalidate a US patent assignment?
Not automatically. US patent law requires a written instrument to assign patent rights. Acknowledgment can provide evidence of execution, but validity may also depend on the document, signatures, authority and applicable contract law. Specific advice is required.
Does a nominal payment make an assignment invalid?
Not by itself. Consideration, conditions, payment performance and enforceability depend on the instrument and applicable law. A payment dispute may be separate from whether title transferred.
Is a US application merely an extension of a European patent?
No. Patents are territorial. A related US application may claim priority or enter through the PCT national phase, but it is a distinct US right subject to US filing, inventorship, ownership and examination rules.
Can incorrect inventorship be corrected?
Often there are correction mechanisms, both before the EPO and under US law, but requirements depend on the procedural stage, evidence and whether parties agree. Correction of inventorship does not automatically decide ownership or compensation.
Does the EPO verify that the applicant truly owns the invention?
In EPO proceedings the applicant is deemed entitled to exercise the right to the European patent. A substantive dispute over entitlement may need a final decision from a competent national forum, after which European procedural remedies may apply.
Can WIPO overturn a national patent-office or employment decision?
Not as a general appellate court. WIPO administers international systems such as the PCT and offers consensual dispute-resolution services, but national rights and judgments must be challenged through the competent national or regional route.
Can an employee inventor claim additional compensation?
Possibly. Some European national laws provide employee-inventor remuneration and later adjustment, while other systems rely more heavily on contract and policy. The applicable employment law, facts and prior payments must be reviewed.
What should I send for an initial assessment?
After a conflict check, provide a concise chronology, current deadlines, relevant employment and invention-assignment documents, the patent-family list, inventor records, key technical evidence and any decisions or pending pleadings. Do not send an unstructured archive before scope and confidentiality are confirmed.
Official and primary sources
- European Patent Convention: right to a European patent
- European Patent Convention: applications filed by non-entitled persons
- European Patent Convention: inventor’s right to be mentioned
- European Patent Convention: designation of the inventor
- EPO Guidelines: transfer of a European patent application
- USPTO Manual: inventorship
- USPTO Manual: inventor’s oath, declaration and substitute statement
- US patent statutes: filing, correction, ownership and assignment
- USPTO Manual: effect of recording assignment documents
- WIPO: PCT filing and national-phase overview
- WIPO: territorial patent rights and employee inventions
- Czech patent law: right to a patent and employee inventions
Clarify the patent family, the chain of title and the available remedy
Bauer IP assists with European and Czech patent matters, EPO procedure, technical claim analysis and cross-border coordination. US-specific opinions and proceedings can be coordinated with appropriately qualified US counsel.