IP Due Diligence: Verifying What a Buyer Is Actually Acquiring

In technology and consumer-brand deals, the intellectual property often is the deal. Everything else — the entity, the contracts, the employees — is infrastructure around a set of rights that either transfer cleanly or do not. IP diligence exists to find out which.

The exercise answers three questions in order. Does the target own what it says it owns? Are those rights valid, in force, and unencumbered? And will anything important break when control changes hands? Problems found early become price adjustments or pre-closing fixes. The same problems found after closing become litigation.

Scope the review before requesting documents

Not every deal deserves the same depth. A buyer acquiring a brand needs exhaustive trademark work and little patent work; a buyer acquiring a software platform needs the reverse plus a full open-source analysis. Scope the review against what actually creates value, then request documents accordingly.

Three preliminary questions set the depth. What are the top five revenue-generating products, and which rights protect each? What third-party technology is embedded in those products? And is the buyer acquiring the entity, which carries rights automatically, or specific assets, which must be identified and conveyed individually? Asset deals require far more precision because anything left off the schedule stays behind.

Chain of title: where the defects live

Ownership is verified from the creator forward, not from the target's schedule backward. For every material asset, the buyer wants an unbroken line of signed instruments.

• Founder assignments executed at or before incorporation, covering work done during the pre-formation period.
• Employee agreements with present-tense invention assignment and confidentiality obligations, checked against state-law limits.
• Contractor and agency agreements with assignments, not just work-for-hire language — the distinction is explained in our guide to IP assignment and work for hire.
• Inventor assignments recorded with the USPTO for each patent and application, with every named co-inventor accounted for.
• Assignment documents from any prior acquisitions, including the recorded instruments rather than just the purchase agreements.
• Trademark assignments that expressly convey the associated goodwill, since assignments in gross can be invalid.
• Corporate name changes and mergers reflected in the public assignment records so recorded ownership matches the current entity.

Two patterns account for most findings. The first is the pre-incorporation gap: work created by founders before the company existed, never formally assigned. The second is the contractor gap, where the design, the first version of the product, or the marketing site came from a freelancer who signed nothing. Both are usually fixable with confirmatory assignments — while the creators are reachable and cooperative.

Registration status and maintenance

Registered rights are the easiest to verify and the most embarrassing to get wrong. Pull the public record for every registration and application on the schedule, and check it independently against the USPTO and Copyright Office databases.

Two items deserve extra attention. Trademark schedules frequently list goods and services broader than the business actually sells, which creates cancellation and audit exposure, as our article on opposition and cancellation proceedings describes. And upcoming deadlines — an unanswered office action, a maintenance window closing in weeks — should move from the diligence report to the closing checklist immediately, because a lapse during signing-to-closing is nobody's idea of a good surprise.

The licence stack, in both directions

Owned rights are only half the picture. Most products depend on rights the target does not own, and most revenue may depend on rights the target has licensed to others.

Inbound licences

For each material inbound licence, the buyer needs the scope of the grant, whether it is exclusive, the term, the fees, the territory, and — critically — the assignment and change-of-control provisions. A licence that terminates or requires consent on a change of control gives the counterparty leverage precisely when the buyer has none. Identifying these early allows consents to be sought as a pre-closing condition.

Also check whether inbound rights are broad enough for the buyer's plans. A licence limited to internal use does not support incorporating the technology into a product, and one limited to a territory does not support the international expansion in the investment thesis.

Outbound licences

Exclusive licences granted by the target reduce what the buyer is acquiring, sometimes drastically. Look for exclusivity by field of use or territory, most-favoured-nation pricing, options to extend, and rights of first refusal. Trademark licences require a separate look at whether quality control was genuinely exercised, since naked licensing can undermine the mark itself — the subject of our guide to trademark licensing and quality control.

Open source

Ask for a generated software bill of materials rather than a management assurance. The specific concerns are copyleft-licensed components in distributed software, AGPL components in hosted services, missing attribution notices, and whether the target has ever signed a customer representation about open-source use that its inventory would not support. The obligations and how they attach are explained in our guide to software and open-source licensing.

Encumbrances, disputes, and freedom to operate

Security interests in IP appear in two places: UCC financing statements filed at the state level and security interests recorded against patents, trademarks, and copyrights in the federal registers. Both should be searched, and any liens to be released at closing should be identified with payoff and termination documentation.

On disputes, request all cease-and-desist letters sent and received, pending and threatened litigation, TTAB and PTAB proceedings, and any settlement or coexistence agreements. Coexistence agreements are easy to miss and can permanently constrain how a brand may be used or where it may be sold.

Freedom-to-operate analysis — whether the target's products infringe third-party patents — is a separate and more expensive exercise than ownership diligence. Buyers commonly commission it only for the highest-value product lines or where the target operates in a densely patented field.

Turning findings into deal terms

Diligence is only useful if it changes the documents. Findings typically translate into one of five responses:

1. Pre-closing conditions. Obtain confirmatory assignments, third-party consents, lien releases, or remediation of a compliance gap before the deal closes.
2. Specific indemnity. A known issue carved out of the general indemnity basket, often with its own cap and survival period.
3. Escrow or holdback. Funds retained against a quantifiable risk, released on a defined milestone.
4. Price adjustment. Where a defect permanently reduces the value of what is being acquired.
5. Representations and warranties. Tailored IP reps on ownership, non-infringement, open-source use, and the completeness of the disclosure schedules, backed by insurance in larger deals.

The general framework these fit into — indemnity baskets, caps, survival, materiality qualifiers — is common to all deal diligence and is covered in our M&A legal due diligence checklist.

Frequently asked questions

How long does IP diligence take?

For a small technology target with a clean record, a focused review runs one to three weeks alongside the rest of diligence. Complex portfolios, extensive licensing, or a full open-source scan take longer. The variable that most affects timing is the quality of the target's own records — a company with an organised IP register moves quickly; one reconstructing history from email does not.

What is the single most common finding?

Missing contractor assignments. The pattern repeats across deal sizes: early work outsourced under a short agreement with no assignment clause, or with work-for-hire language covering a category that does not qualify. The fix is a confirmatory assignment, which is usually straightforward if the contractor can be located and has no reason to be difficult.

Do we need registrations, or is unregistered protection enough?

It depends on the right. Copyright exists without registration but registration is generally required before suing on a U.S. work. Trademark rights arise from use, but registration provides nationwide priority and presumptions. Patents exist only if granted. Buyers discount unregistered positions because they are harder to verify and harder to enforce.

Should sellers run their own diligence first?

Yes, when there is time. Sell-side IP diligence finds the same gaps a buyer would, at a moment when they can be fixed quietly and cheaply. It also produces the organised schedules and document set that make a buyer's review faster, which shortens the exclusivity period and reduces the room for renegotiation.

Does an asset purchase transfer IP automatically?

No. In an asset deal, only the assets identified and conveyed transfer. Each patent, registration, application, domain, and licence should be scheduled specifically, with separate assignment instruments for recordation at the USPTO and, where appropriate, the Copyright Office. Anything omitted stays with the seller, and post-closing clean-up is awkward once the parties have gone their separate ways.

From checklist to close

Good IP diligence is narrow and deep rather than broad and shallow. Identify the handful of assets that carry the value, verify them exhaustively from creator to current owner, then confirm that the third-party rights those assets depend on will survive the transaction. A hundred-item schedule reviewed superficially is worth less than five assets verified properly.

Sellers who want a smooth process can do most of this work in advance: maintain a live IP register, record assignments as they are signed, keep a generated dependency inventory, and calendar every maintenance deadline. Companies that build those habits early — using the practices described across our intellectual property hub — rarely find themselves negotiating an escrow over paperwork that should have been signed years earlier.

Sources & further reading

• USPTO — Main site
• U.S. Copyright Office
• USPTO — Trademarks
• USPTO — Patents