Who owns what becomes the quietest expensive question.

The four categories of TSA IP.

TSA intellectual property splits into four categories and each category has its own dispute pattern. The first category is transferred IP. Trademarks, patents, copyrights, and trade secrets that move with the carved-out business as part of the sale. The Sale and Purchase Agreement governs the transfer. The TSA only needs to confirm that the seller will not use the transferred IP in its retained business and will not assert it against the Newco.

The second category is licensed IP. Brand marks, proprietary software, internal tooling, and process documents that the Newco uses during the TSA period under a license from the seller. The license has scope, duration, territory, and termination terms. Most disputes arise here because the operating reality drifts from the license language.

The third category is third-party IP. Vendor software, cloud platforms, and open source components that the seller licenses on the Newco's behalf during the TSA. Consent rights, transfer language, and license caps drive most of the friction. The fourth category is created IP. Improvements, configurations, and data sets that emerge during the TSA. Ownership is rarely specified and disputes are common at exit. The pattern overlaps with the broader TSA intellectual property licensing playbook.

Trademark transition and the seller's brand.

When a Newco operates under a transitional trademark license, the seller's brand stays on packaging, invoices, signage, websites, employee email signatures, and customer communications for a defined period. The license has a hard end date. After that date, every appearance of the seller's brand by the Newco is unlicensed use, which the seller can challenge.

Disputes arise on three axes. The first is scope. The Newco wants to use the seller's brand on a new channel or in a new geography not contemplated in the license. The second is timing. Re-branding lead times routinely exceed the license window, especially for physical product, regulated packaging, or signage that needs municipal permits. The third is co-branding. The Newco wants to display a transitional notice such as a formerly known as line that the seller views as either too prominent or too persistent.

The disciplined buyer addresses these in pre-signing. Build the trademark license with realistic transition windows for each customer touchpoint, include explicit co-branding language, and provide for an extension fee that is reasonable rather than penal. Most trademark friction during the TSA traces back to thin pre-signing work.

Software licenses that do not travel.

A large share of TSA IP disputes involve third-party software the seller licensed for enterprise use and now provides to the Newco under the TSA. The seller's master license may permit affiliate use, may permit use only for the seller's own business, or may require vendor consent before extending coverage to a divested entity. The TSA cannot grant rights the seller does not have. When the underlying vendor objects, the dispute is three-way.

The common pattern is delay. The seller does not flag the consent requirement at signing. The Newco consumes the software for months under the TSA. The vendor discovers the use, often during a routine audit, and asserts an unlicensed use claim. Both parties scramble to procure a license retroactively, often at premium rates and with audit penalty exposure attached.

The remedy is a pre-signing audit of every material vendor agreement and a clear allocation of which party will procure consent, by when, and at whose cost. The work overlaps with the TSA third-party vendor consents playbook. When a vendor objection still surfaces during execution, the buyer treats it as a governance event and pursues a joint resolution with the seller rather than absorbing the cost alone.

Configuration, data, and created IP.

During the TSA period the seller's teams maintain and improve the Newco's environment. Configurations are tuned. Custom reports are written. Workflows are refined. Data sets accumulate that did not exist at close. Each of these is a form of intellectual property. The TSA rarely specifies ownership and the dispute pattern emerges at exit when the seller positions some of this work as the seller's IP not transferable to the Newco.

The remedy is upfront language. Created IP during the TSA, to the extent it relates to the Newco's business, vests in the Newco. The seller has a non-exclusive license to retain copies for legitimate audit and continuity purposes. Reports, configurations, and master data are deliverables of the TSA, not the seller's property. The language is not controversial when raised in pre-signing. It is contentious when raised in exit planning.

The buyer that maintains a running inventory of created IP through the TSA catches the issue early. The inventory is short and dull. The dispute it prevents is long and expensive.

Patent assertion and field of use.

Patent disputes are less frequent than trademark and license disputes but more expensive when they occur. The pattern is typically a field of use limitation in the patent license the seller granted to the Newco. The Newco enters an adjacent market and the seller asserts that the new field is outside the licensed scope. The Newco's growth plan was built assuming the license covered the expansion. The reading of the license is contested.

The disciplined buyer addresses this in two ways. First, in pre-signing, examine the field of use language with explicit reference to the value creation plan. If the plan contemplates an adjacency, the license should cover it. Second, in execution, raise any planned market expansion through governance before it becomes operational. A seller that is informed of the plan in advance is far less likely to assert the patent than a seller that discovers it from a press release.

When a patent assertion does arrive, the buyer treats it as a contract dispute first and a patent dispute second. The TSA is the controlling document. The patent license is a schedule. The remedy lives in the agreement before it ever reaches a court.

Closing the dispute and the IP file.

Every IP dispute closes in two places. The first is the contract record. An amendment, a side letter, or a documented change order records the resolution and binds both parties for the remainder of the TSA. Verbal handshakes on IP do not survive a change of personnel on either side. The second is the IP file. The fix has to land in the actual license documents, the actual asset register, or the actual filing record. A resolved dispute that did not change the underlying paper will resurface the next time the IP changes hands.

At exit, the IP workstream has its own deliverable. Every licensed mark, every borrowed software seat, every shared trade secret is either transferred, terminated, or extended under a documented protocol. The buyer's exit checklist runs through it line by line. Without that discipline, residual IP claims live at the seller and become the Newco's distraction long after Day One.

Specialist support across the IP dispute lifecycle is part of the TSA Dispute Resolution practice when the buyer needs experienced help on a contested matter. The work coordinates with the buyer's IP counsel, the seller's legal team, and any third-party licensors involved.

More on disputes and governance.