Learn what an ip assignment agreement must include at formation, why wording matters, and how to avoid due diligence traps before raising outside money.
By Omer Aydin ·
An IP assignment agreement is a written contract in which a founder legally transfers ownership of intellectual property, including code, inventions, designs, and trade secrets, to the company at formation. Without it, IP created before or during early development stays with the individual, not the startup, putting fundraising and acquisition at serious risk.
Most founders treat this document as a formality. It is not. The wording, the timing, and the consideration structure all matter in ways that surface only when a deal is already on the line. This article covers the specific traps that cause IP assignments to fail due diligence, and what you need to do before you take a dollar of outside money.
This article is not legal advice. Have your company's counsel review any IP assignment agreement before you sign it.
An IP assignment agreement is a contract that moves ownership of intellectual property from a person to a legal entity, typically the startup company at the moment of incorporation. It covers everything: source code written on a personal laptop before the company existed, domain names, brand assets, provisional patent applications, and any trade secrets developed during the pre-incorporation period.
The core problem is that work created before a company exists cannot automatically belong to that company, because the company did not yet exist to own it. Founders who spend six months building a product before incorporating have created real assets, and those assets legally belong to them as individuals until a written assignment transfers them.
This matters enormously at the due diligence stage. According to Ironclad's 2026 report, missing IP assignment documentation is a high-risk due diligence item because intellectual property can represent more than 80% of a startup's total value. Investors and acquirers check this first. A gap here does not just slow a deal; it can kill it.
Use "hereby assigns" in your agreement, not "agrees to assign." These two phrases produce completely different legal outcomes.
"Hereby assigns" is a present-tense transfer. The moment both parties sign, ownership moves. The company holds the IP. There is nothing left to enforce, no future action required, no risk that a founder later refuses to complete the transfer.
"Agrees to assign" is a promise about the future. It creates an obligation to transfer, but it does not transfer anything yet. If the founder later disputes the assignment, becomes unreachable, or files for personal bankruptcy, the company may have to go to court to compel the transfer. That is an expensive problem to solve during a Series A close.
Investors and their counsel know this distinction. When they see "agrees to assign" in a founder IP agreement, they flag it. Some will require a corrective assignment before proceeding. Others will price the uncertainty into the deal terms. Use the present-tense language from the start and avoid the conversation entirely.
Yes. A contract without consideration is not enforceable, and an IP assignment agreement is a contract. Consideration means each party gives something of value. The company receives the IP; the founder must receive something in return.
Two approaches are common. The first is founder stock issuance: the company issues equity to the founder as part of the same transaction at incorporation. This is the cleanest structure because the consideration is substantial and directly tied to the assignment. It also aligns with how most Delaware C-corps are set up at formation, where founders receive their initial shares in exchange for contributing IP and services.
The second approach is nominal cash, typically one dollar. If your counsel recommends nominal cash consideration, use it, but founder equity is the more defensible choice. If you are adding a co-founder after the company is already formed, the consideration structure needs revisiting. Employment or advisor agreements sometimes include IP assignment clauses, but those need their own consideration analysis.
Getting the execution right means following the steps in order. Skipping step one, or signing before you have completed step three, creates the exact gaps that surface in due diligence. If you have not yet incorporated, the company formation process determines when these documents take effect, so complete incorporation before you execute any assignment.
Step 1: Identify all assets created before incorporation. Make a written list of every piece of IP you created before the company existed: code repositories, design files, domain names, provisional patents, research notes, and any tools or libraries you wrote yourself. Be thorough. Investors will ask.
Step 2: Draft the agreement using language for an immediate transfer. Use "hereby assigns" throughout. The agreement should name the specific assets being transferred, or reference the list you created in step one as an exhibit. Vague language like "all IP related to the business" invites disputes about scope.
Step 3: List any personal projects or pre-existing code that is not being transferred. This is the carve-out schedule, and it is just as important as the assignment itself. If you have open-source projects, freelance work under prior contracts, or personal tools you want to keep, list them explicitly. An uncarved-out asset looks like an assigned asset to an investor. Silence is not a safe default.
Step 4: File the signed document with relevant federal offices. For patents and patent applications, record the assignment with the USPTO. Per bydesignlaw.com, the USPTO has recorded over 10.5 million patent assignments and transactions since 1970, covering approximately 18.8 million patents and applications. That volume reflects how routine this step is for companies with patent assets. For trademarks, the process differs, covered in the next section.
On notarization: U.S. law does not strictly require notarization for IP assignments, but per Buchanan Ingersoll & Rooney PC's guidance, notarization is strongly preferred during execution. A notarized assignment is harder to challenge later. If you are assigning anything with meaningful value, notarize it.
Patent and trademark assignments follow different rules, and confusing them creates real problems.
For patents, the key issue is the recording window. The USPTO accepts assignment recordation at any time, but recording promptly matters. A later assignee who records first, without notice of your earlier assignment, can take priority. Record within three months of signing to preserve priority protection. Given that the USPTO has processed over 6 million patent assignments since 1970, the recording infrastructure is well-established. Use it.
For trademarks, the rule is different. A trademark assignment must transfer the goodwill associated with the mark, not just the mark itself. An assignment that transfers the name or logo without the goodwill is called an "assignment in gross" and is invalid under U.S. trademark law. Your agreement should include language confirming that goodwill transfers alongside the mark.
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An NDA (non-disclosure agreement) keeps information confidential. It does not transfer ownership of anything. An IP assignment agreement actually moves ownership of intellectual property from one party to another. You may need both: an NDA to protect information shared during negotiations, and an IP assignment to ensure the company owns what its founders built. They serve different purposes and neither substitutes for the other.
No. U.S. law requires IP assignments to be in writing. A verbal agreement to transfer a patent, trademark, or copyright has no legal effect on ownership. If a founder and co-founder shook hands on "you own the company, I own nothing," that arrangement is unenforceable without a signed written document. Courts will not imply an assignment from conduct or conversation alone.
Investors will find the gap during due diligence and require a corrective assignment before closing. The problem is that a retroactive assignment signed under pressure can raise questions about its validity, especially if the founder's circumstances have changed. Some investors will accept a corrective assignment with a clean representation. Others will reduce valuation or add indemnification provisions to account for the risk. Signing at formation costs nothing; fixing it later costs time, money, and negotiating power. Review your stockholders agreement provisions alongside founder IP assignments to make sure ownership and equity terms align from the start.
Yes. Founder IP assignments cover what founders built. Employees and contractors need their own agreements. Under 17 U.S.C. § 101, work-for-hire doctrine covers some employee-created work automatically, but the categories are specific and the doctrine does not apply to independent contractors at all. Any contractor who writes code, creates designs, or develops other IP for your startup should sign a written assignment as part of their engagement. Review your stockholders agreement provisions alongside these agreements to make sure ownership and equity terms align.
Moral rights are personal rights that creators hold in some jurisdictions, including the right to be credited as the author and the right to object to modifications of their work. The U.S. recognizes limited moral rights only for visual art. But in France, Germany, Canada, and many other countries, moral rights cannot be waived or transferred by contract. This means a foreign contractor's IP assignment may transfer economic ownership to your company while leaving the contractor with enforceable personal rights over the work. Have counsel review any assignment from a contributor in a country with strong moral rights protections before you rely on it in due diligence.
For patents and trademarks specifically, the same principle applies: an assignment that looks complete under U.S. law may leave gaps when the contributor is based abroad. If your codebase or design work involves contributors outside the U.S., have counsel review the assignment language for each jurisdiction. Ongoing LLC annual compliance obligations can also affect how IP ownership is maintained after formation, so confirm your entity stays in good standing.
An IP assignment agreement transfers ownership of everything a founder built, before and during early development, to the company. Use "hereby assigns" for an immediate transfer, attach a clear asset list, include a carve-out schedule for personal projects, and record patent assignments with the USPTO promptly. Notarize when you can.
The practical next step is straightforward: before your next funding conversation, pull together a list of every IP asset you created before incorporation and confirm that a signed, present-tense assignment covers each one. If you have foreign contributors in your codebase, flag those for a separate counsel review. A clean IP chain is not a legal nicety; it is the first thing investors check, and fixing gaps after a term sheet arrives costs far more than getting it right at formation.
