A physician designs a better instrument on a weekend, at home, with their own money. Who owns it?
Under U.S. patent law, the inventor does. Ownership starts with the person who conceived the invention, and it moves only by assignment. That is the default, and it is a good one for physicians.
The default gets displaced by whatever you signed. For most clinicians the relevant documents are an employment agreement, an institutional intellectual property policy incorporated into it, and possibly a residency, fellowship, faculty, or consulting agreement layered on top. This article is about how those documents change the answer, and what to check before you file.
Three Ways the Default Gets Displaced
An assignment clause. Most hospital and health system agreements include one. It says that inventions you make during employment, within some defined scope, belong to the institution, and often that you presently assign them. The scope is the whole question. Some clauses reach only inventions made with institutional resources or within your assigned duties. Others reach anything related to the institution's field of activity, which for a health system is broad enough to cover most medical devices.
Hired to invent. Even without a written assignment, an employee who was specifically hired or assigned to solve a particular problem may owe the resulting invention to the employer under long-standing common law. This rarely applies to a clinician whose job is patient care. It can apply to a physician with a defined research or product development role, and the job description matters more than the title.
Shop rights. If you used the employer's time, facilities, equipment, or materials to make the invention, the employer may acquire a non-exclusive right to use it even where you keep ownership. That is a license, not a transfer, but it matters to a licensee who wants exclusivity.
The Resource Trigger Is Lower Than You Think
The phrase that decides most physician cases is "institutional resources." Physicians read it as meaning a machine shop or a research grant. Policies frequently read it much more broadly: a conference room, a staff engineer's afternoon, a 3D printer in the simulation lab, patient data, the clinical setting itself. Trying a prototype in the simulation lab, or evaluating it with colleagues on institutional time, is a use of institutional resources under many policies, and it is the most natural thing in the world for a surgeon to do.
The question is not whether you think of it as a resource. The question is whether the policy does. Read the definition, not the summary.
What to Check Before Filing
Gather the actual documents, not your memory of them. Then answer these questions in writing, for yourself and for your attorney:
- What does the assignment clause cover: all inventions, inventions related to the employer's business, or only inventions made with employer resources or within assigned duties?
- Does the clause use present-assignment language ("hereby assigns") or a promise to assign in the future? Courts have treated those differently, and the difference can decide who holds legal title today.
- What counts as a resource under the policy, and did you use any?
- Is there a disclosure obligation, and does it run from conception, from building a prototype, or from some other event?
- Do you hold a second appointment, at a medical school or a research institute, with its own policy?
- Have you signed consulting, sponsored research, or clinical trial agreements with industry? Those routinely assign inventions arising from the engagement.
- Was any part of the development federally funded? If so, separate rules apply.
Several states limit how far an employer assignment clause can reach into inventions made entirely on your own time, without employer resources, and outside the employer's business. Whether such a limit applies to you depends on where you work and what the clause says. That is a question for counsel, not a general rule to rely on.
Why This Comes Before Filing
A U.S. application names the inventors and, separately, the applicant, which is whoever owns the invention or has the right to it. If you file as the applicant and your employer holds a present assignment, you have filed an application you do not own. That defect surfaces at the worst moments: when a licensee's counsel runs diligence, when an investor's counsel does, or when the institution notices and asserts its rights.
It also runs the other way. Many institutional policies require you to disclose an invention to a technology transfer office within a set period, often before any filing or public disclosure. Filing quietly to avoid the question does not avoid it. It breaches the agreement, and the breach becomes visible exactly when the invention becomes valuable.
Institutional ownership is not necessarily bad. Institutions often release inventions they do not intend to pursue, share licensing revenue with inventors, pay for prosecution, and license back to a founder's company. The outcome to avoid is unresolved ownership discovered during a financing, when the institution has leverage and you have a deadline. What that process looks like, and what changes if you are leaving, is covered in Physician Inventors and Who Owns the Device.
A Hypothetical, to Make It Concrete
Suppose a surgeon employed by a health system designs a new retractor blade at home, has a friend machine it, and then tests it in the hospital's simulation lab with help from a staff engineer. The employment agreement assigns inventions "related to the employer's business and made with the use of employer resources."
The design work at home used no resources. The simulation lab, the models, and the engineer's time are resources under almost any policy. Under that clause the institution has a credible claim, and the surgeon should resolve it, by release or license, before filing in their own name. Had the surgeon filed a provisional application on the design before walking into the lab, the invention described in that filing would have been conceived and documented without institutional resources, and the later testing would be a separate question. Sequence changes the answer. This is a hypothetical, and real agreements vary, but the pattern is common.
What To Do
- Pull every agreement and policy that might apply, including the current IP policy and the version in force when you conceived the device.
- Document when you conceived the device and what resources, if any, you used.
- Determine whether a disclosure obligation has already been triggered.
- Get advice on sequencing: institutional disclosure, release or license, and patent filing, with any conference dates in view.
- Resolve ownership completely before you form a company or raise money.
Once ownership is settled, the filing process is the same as for any device inventor, and it is covered step by step in How a Physician Patents a Medical Device.
Frequently Asked Questions
If I invented a device at home on my own time, does my hospital own it?
Not by default. U.S. law gives ownership to the inventor. Whether the hospital has a claim depends on the assignment clause in your employment agreement and the institutional IP policy, in particular whether they reach inventions related to the institution's field and whether you used any institutional resources.
What does "hired to invent" mean for a physician?
It is a common law rule that an employee hired or specifically assigned to solve a particular problem may owe the resulting invention to the employer even without a written assignment. It rarely reaches a clinician whose role is patient care. It can reach a physician with a defined research or product development role.
Does testing my prototype at the hospital count as using hospital resources?
Under many institutional policies, yes. Facilities such as a simulation lab, staff time, equipment, patient data, and the clinical setting itself are frequently defined as institutional resources. Read the definition in the policy rather than assuming.
Should I file first and sort out ownership later?
No. A filed application names an applicant, and if your employer holds a present assignment you may have filed something you do not own. Many policies also require disclosure to the institution before filing. Understand the ownership question first, then file.
To review your agreements and work out a sequence that protects both the invention and your relationship with your institution, request a free consultation. What you share is confidential from the first conversation.
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.