Your Patent Prosecution History Decided a $5.7 Billion Verdict

On September 25, 2026, a jury in the Southern District of California returned a verdict against Apple for $5,721,961,750. It is the largest patent verdict ever returned in the United States, more than double the previous high.

The headline writes itself, and the headline is the least useful part. What is worth your time is how the case got there, because it was over once already.

What the case was about

Taction Technology sued Apple in 2021 over two patents, 10,659,885 and 10,820,117, covering tactile transducers that produce bass-frequency vibration. The accused technology was the Taptic Engine, the component that makes an iPhone and an Apple Watch buzz in your hand.

Taction is not a licensing entity that buys patents to sue on. It is a small San Diego company with two founders that builds haptic hardware, and its technology sits in consumer headphones you can buy today. That matters for how you read the case, and it is unusual at this scale.

The case died in 2023

Before any of this reached a jury, the district court granted Apple summary judgment of non-infringement. The reason had nothing to do with whether Apple’s product worked the way Taction’s patents described.

The court construed the claims narrowly, and it did so by reading what Taction had said during prosecution. It concluded that the claims required a “highly damped output” achieved specifically through mechanical damping, with a quality factor below 1.5. Apple’s product did not meet that reading, so the case ended.

That is a total loss, on paper, without a trial.

The Federal Circuit read the same file differently

On August 13, 2025, the Federal Circuit reversed.

The appeals court agreed that Taction’s prosecution arguments amounted to a disclaimer, and that the disclaimer supported the “highly damped output” limitation. But it held the district court had gone further than the file supported. Nothing in what Taction told the examiner limited the claims to mechanical damping alone, and nothing imported a numeric quality-factor threshold into them. The court also found the district court had wrongly struck expert testimony.

Same documents. Same sentences. Two courts, two readings, and between those readings sat the entire case.

Only after that reversal did the case reach a jury at all.

What a patent prosecution history disclaimer is, without the jargon

When an examiner rejects your claims over earlier patents, your attorney responds. Often that response says, in effect, that your invention is different because it does this particular thing.

That statement is not a private negotiating position. It is a public disclaimer, and years later a court will hold you to it. If you told the Office your claim does not cover something in order to get the patent granted, you do not get to say in litigation that it covers that thing after all.

The doctrine is sensible. The public is entitled to read the file and know what you gave up. The difficulty is that a sentence written under time pressure to overcome one rejection may reach much further than its author meant, and nobody finds out until a judge reads it a decade later.

That is exactly what was litigated here. The dispute was not whether Taction had disclaimed something. It was how far the disclaimer went.

Why this reaches your business, and not because of the money

Nobody reading this is going to collect $5.7 billion, and a post that treats a record verdict as an aspiration is closer to a lottery advertisement than advice. Skip that reading.

The transferable part is smaller and much more likely to happen to you.

Every response to an examiner is a permanent public statement about your claim scope. It will be read adversarially, by someone whose job is to find the narrowest defensible interpretation of what you wrote.

The cheapest way to get a patent granted is often the most expensive way to own one. Narrowing a claim or making a broad distinguishing argument gets past a rejection quickly. It also hands a future defendant the argument that your patent does not cover their product. That trade is worth making sometimes. It should be made deliberately, with the competitor’s product in mind, not as a reflex to clear an office action.

Your patent prosecution history is part of the asset. If you are raising money, licensing, selling a portfolio, or considering enforcement, the file history is what a serious counterparty examines. A patent with a clean prosecution record is worth more than one with the same claims and a file full of concessions.

The same discipline decides whether a claim is worth anything in the first place, which we covered in what is patentable. Different question, identical lesson: the words decide, and the words are fixed long before anybody sues.

Be honest about what this verdict is

Four things belong in any accurate account, and they are the ones most coverage leaves out.

The jury found no willful infringement. That forecloses enhanced damages, and it tells you the jury did not think Apple acted in bad faith.

The verdict is not final. Apple has moved to set it aside and has said it will appeal to the Federal Circuit.

Large patent verdicts have a poor survival rate. Idenix v. Gilead was $2.54 billion and was vacated. VLSI v. Intel was $2.18 billion and was vacated. Centripetal v. Cisco was $1.9 billion and was vacated. The pattern is strong enough that the litigation funder behind Taction, which stands to receive roughly $1.4 billion if the verdict is paid as returned, said in its own public statement that very few large patent verdicts survive the post-verdict process intact.

It needed outside money to happen at all. Taction reached trial with litigation funding. A five-year fight against Apple is not something a two-founder company finances from revenue, and pretending otherwise would misrepresent what it takes to enforce a patent against a defendant of that size.

None of that undoes the point about the file history. It does mean the honest framing is “your prosecution record is the asset,” not “small company beats Apple.”

What to do about it this quarter

If you have pending applications, ask your attorney a direct question: what have we argued to the examiner, and what does that argument concede? A competent answer should reference the products you actually care about.

If you have issued patents you might rely on, have the patent prosecution history read before you rely on them. The time to learn that a 2019 response gave away your best claim is before you send a demand letter, not after the response arrives. Our post on how to know if something is patented covers the searching side of the same discipline.

And if you are choosing between a fast, cheap prosecution strategy and a careful one, this case is the argument for the careful one, in both directions. Careless prosecution nearly ended Taction’s case permanently. Careful appellate reading of the same file is what saved it.

FAQ

What is a patent prosecution history?

The complete public record of correspondence between an applicant and the Patent Office: the application, the examiner’s rejections, and every response and amendment. Anyone can read it, and courts do.

What is prosecution history disclaimer?

A rule that holds you to what you told the Patent Office. If you argued your claim does not cover something in order to get the patent granted, you cannot later argue it does.

Does this mean I should never argue with an examiner?

No. Arguing is how patents get granted. The point is that arguments have a price in claim scope, and the price should be understood before it is paid rather than discovered in litigation.

Is the $5.7 billion actually going to be paid?

It is not final. Apple has moved to set the verdict aside and intends to appeal, and the three previous billion-dollar patent verdicts were all vacated.

Was this a patent troll case?

No. Taction builds and sells haptic hardware. It did use litigation funding to finance the case, which is a different thing from being a non-practicing entity.

Can I read my own file history?

Yes. It is public. Your attorney can pull it, and reading it before you rely on the patent is worth the hour.

Why this is worth a conversation

The most consequential writing in a patent is not in the patent. It is in the patent prosecution history: the responses your attorney files to overcome rejections, and those responses fix your claim scope permanently in language that a hostile reader will parse years later. Deciding how to answer a rejection is a judgment call about the future: which competitor’s product matters, what you can afford to concede, and what a court will make of the sentence you are about to file.

That judgment is what separates a patent that reaches a competitor from one that reads well and stops nobody. It is also, as this case shows, the difference between a summary judgment loss and a jury trial, and it costs a tiny fraction of either.

The attorney work described above begins if you engage the firm. The first step is simpler than that. A Complimentary Patent Needs Assessment is a conversation with one of our IP Intake Specialists about your invention, your goals, and what protecting it would involve, with no cost and no obligation. If you move forward, our patent attorneys, who have served Fortune 500 companies including Apple, Google, Intel and Microsoft, build your strategic protection plan.