Litigation

Apple Inc. v. Headwater Research LLC

dismissed

3:25-cv-07591

Auto-generating section 1 of 5: Case overview & background…

Each section takes ~30-60s with web-search grounding. Keep this tab open — sections will fill in below as they complete.

Court: N.D. Cal.
Terminated: 2025-11-03

Patents at issue (4)

9232403 PTAB challenge active

9491564 2 active PTAB challenges

Plaintiffs (1)

π Apple Inc.

Defendants (1)

Δ Headwater Research LLC

Summary

Apple Inc. filed a declaratory judgment action against Headwater Research LLC in the Northern District of California, asserting U.S. Patents 9,232,403; 9,491,564; and 8,639,935. The action was terminated November 3, 2025 via stipulated dismissal. U.S. 8,745,191 was not listed among the asserted patents.

Case overview & background

Plain-language overview of the case: parties, accused product, patents at issue, and why the suit matters.

Not yet generated. Click Generate to run the LLM with web-search grounding (~30-60s).

Key legal developments & outcome

Major rulings, motions, claim construction, settlements, and the present posture or final disposition.

Not yet generated. Click Generate to run the LLM with web-search grounding (~30-60s).

In the news

What the press has reported about this case, summarized with links to the source articles.

Not yet generated. Click Generate to run the LLM with web-search grounding (~30-60s).

Plaintiff representatives

Counsel of record for the plaintiff(s): attorneys, firms, and roles (lead counsel, of counsel, local counsel).

Not yet generated. Click Generate to run the LLM with web-search grounding (~30-60s).

Defendant representatives

Counsel of record for the defendant(s): attorneys, firms, and roles (lead counsel, of counsel, local counsel).

Not yet generated. Click Generate to run the LLM with web-search grounding (~30-60s).

Record id: 8745191-3-25-cv-07591 · edit in Admin

Further reading

Finding prior art with free tools: Google Patents, Lens, Espacenet, and more
A serious paid prior-art search costs $5,000 to $20,000. The first 80% of what you'd find is sitting behind free tools — if you know how to drive them.
The first 30 days after a patent infringement complaint
Most defendants spend the first 30 days reacting. The defendants who do well spend it sequencing — because every move you make in month one shapes the budget, leverage, and exit options for the next two years.
KSR International v. Teleflex (2007)
Pre-KSR, an obviousness rejection required explicit teaching, suggestion, or motivation in the prior art. Post-KSR, common sense, design needs, and predictable variations all do the work — and most patents don't survive.
Markman v. Westview Instruments, Inc. (1996)
Claim construction is exclusively the court's job. The Markman hearing is the most consequential single ruling in nearly every patent case — and a defendant's best chance to end the litigation before trial.
Patent reviews: IPR, PGR, and reexamination
Suing in district court to invalidate a patent costs $3-5M and takes years. The USPTO's post-grant review system does it for $200-500k and 12-18 months. For a defendant facing a weak patent, the choice is usually obvious.

All resources →