News & Analysis as of

Patent Infringement Appellate Courts

Patterson Belknap Webb & Tyler LLP

If at First You Don’t Succeed, Do Not Try Again: Judge Oetken Invokes Collateral Estoppel to Dismiss Plaintiff’s Infringement...

On July 9, 2025, Judge J. Paul Oetken (S.D.N.Y) found that collateral estoppel barred plaintiff Linfo IP, LLC from relitigating the validity of its asserted patent and dismissed Linfo’s infringement claims against Aero...more

A&O Shearman

Federal Circuit Vacates $300 Million Damages Award Due To Flawed Verdict Form

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On June 16, 2025, the U.S. Court of Appeals for the Federal Circuit (“CAFC”) vacated a $300 million damages award because the district court used a flawed verdict form, which included only a single, blanket question as to...more

Hudnell Law Group

Federal Circuit Enforces Gatekeeping Role in Patent Damages Testimony

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On May 21, 2025, the United States Court of Appeals for the Federal Circuit, sitting en banc, reversed a $20 million damages award against Google LLC in a patent infringement dispute with EcoFactor, Inc. EcoFactor, Inc. v....more

Knobbe Martens

Running in Place: When a Running Royalty Is Actually a Lump Sum License

Knobbe Martens on

ECOFACTOR, INC. V. GOOGLE LLC - Before the en banc court, Moore, Lourie, Dyk, Prost, Reyna, Taranto, Chen, Hughes, Stoll, and Stark. Appeal from the United States District Court for the Western District of Texas. A district...more

White & Case LLP

Federal Circuit Tightens Standard for Patent Damages Experts

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On May 21, 2025, the Federal Circuit issued an en banc decision in EcoFactor, Inc. v. Google LLC, highlighting the critical gatekeeping role of district courts under Federal Rule of Evidence 702 and Daubert standards,...more

Sterne, Kessler, Goldstein & Fox P.L.L.C.

Federal Circuit in EcoFactor, Inc. v. Google LLC Probes the Limits for Gatekeeping Damages Testimony

Last week, in EcoFactor, Inc. v. Google LLC, the Federal Circuit issued its first en banc decision in a utility patent case in several years. The case involves the gatekeeping function of district courts vis-à-vis expert...more

Sheppard Mullin Richter & Hampton LLP

The Importance of Preserving Issues for Appeal

This Federal Circuit opinion analyzes claim construction arguments and requests for remittitur in the context of preserving issues for appeal. Background - Belanger is a manufacturer of car wash systems. Belanger owns...more

Sheppard Mullin Richter & Hampton LLP

Federal Circuit Vacates Summary Judgement: Limitations from Specifications Should Not Have Been Imported Into the Claims

The Federal Circuit vacated and remanded the district court’s summary judgement of noninfringement, finding that the lower court had improperly construed the claim term “pull cord.” The district court had erroneously limited...more

McDermott Will & Emery

High Burden Dooms Intra-District Transfer Request

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The US Court of Appeals for the Federal Circuit denied a mandamus petition requesting transfer from the Marshall division to the Sherman division within the US District Court for the Eastern District of Texas, finding that...more

Jones Day

Federal Circuit Reverses District Court’s Application Of Collateral Estoppel

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Kroy IP Holdings, LLC sued Groupon, Inc., alleging infringement of 13 claims of U.S. Patent No. 6,061,660 (“’660 patent’), which relates to incentive programs over computer networks. Those claims were invalidated via...more

Rothwell, Figg, Ernst & Manbeck, P.C.

Product-by-Process Analysis: Invalidity ≠ Infringement

On March 4, 2025, the Federal Circuit affirmed the Patent Trial and Appeal Board’s (“PTAB”) decision in Restem, LLC v. Jadi Cell, LLC, No. 23-2054, 2025 WL 679195, at *1 (Fed. Cir. Mar. 4, 2025), finding that the patent...more

Knobbe Martens

Pulling the Cord on Unstated Claims Limitations

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IQRIS TECHNOLOGIES LLC v. POINT BLANK ENTERPRISES, INC. Before Lourie, Linn, and Stoll. Appeal from the United States District Court for the Southern District of Florida - The district court erred in construing the term “pull...more

Sheppard Mullin Richter & Hampton LLP

Federal Circuit Touches on Appellate Standing and Prior Art Determinations in the Context of Post-Grant Review Proceedings

In CQV Co. Ltd. v. Merck Patent GmbH, the Federal Circuit addressed (1) the interaction of indemnification agreements with Article III standing for appeals of post-grant review decisions of the Patent Trial and Appeal Board;...more

McDermott Will & Emery

Collateral Estoppel Doesn’t Apply to Unchallenged IPR Claims

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The US Court Appeals for the Federal Circuit found that despite a Patent Trial & Appeal Board determination that certain challenged patent claims were unpatentable based on a preponderance of the evidence standard, the patent...more

Fish & Richardson

The Most Interesting Appellate Cases of 2024

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Appellate courts issued a variety of notable intellectual property (IP) cases in 2024, including cases touching on Orange Book listings, extraterritoriality, willful infringement, design patent obviousness, and public...more

Robins Kaplan LLP

Purdue Pharma L.P. v. Accord Healthcare, Inc.

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OxyContin® (oxycodone HCl) - Case Name: Purdue Pharma L.P. v. Accord Healthcare, Inc., No. 2023-1953, 2024 WL 5244764 (Fed. Cir. Dec. 30, 2024) (Circuit Judges Prost, Reyna, and Taranto presiding; Opinion by Prost, J.)...more

Schwabe, Williamson & Wyatt PC

Latest Federal Court Cases - January 2025 #3

Bearbox LLC v. Lancium LLC, Appeal No. 2023-1922 (Fed. Cir. Jan. 13, 2025) In this week’s Case of the Week, the Federal Circuit affirmed a district court’s determination that appellants Bearbox and Austin Storms—Bearbox’s...more

Warner Norcross + Judd

Federal Circuit Affirms the Use of ‘Secret’ Prior Art

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In a recent precedential opinion, the United States Court of Appeals for the Federal Circuit affirmed that a patent application constitutes prior art as of its filing date, not its publication date. In Lynk Labs. Inc. v....more

Knobbe Martens

A Patent Must Describe What Is Claimed, Not What Infringes

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Before Lourie, Prost, and Reyna. Appeal from the U.S. District Court for the District of Delaware. Summary: A patent was not invalid for lack of written description for failing to describe the specific infringing embodiment...more

Weintraub Tobin

Federal Circuit Vacates VLSI’s $2.2 Billion Damage Award Against Intel

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On December 4, 2023, the Court of Appeals for the Federal Circuit vacated a $2.18 billion damage award against defendant Intel Corporation because it found plaintiff VLSI Technology LLC had erred on its damages calculation,...more

Weintraub Tobin

Federal Circuit Continues to Strike Down Patents as Abstract Ideas

Weintraub Tobin on

The Federal Circuit Court of Appeals has again relied on the Supreme Court’s Alice case to invalidate patents on the grounds that they are directed to an abstract idea. Realtime Data LLC v. Fortinet Inc. ( Fed. Cir. 8/2/2023)...more

WilmerHale

CAFC Patent Cases - October 2021 #2

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Precedential Federal Circuit Opinions - CELGENE CORPORATION v. MYLAN PHARMACEUTICALS INC. [OPINION] (2021-1154, 11/05/2021) (PROST, CHEN, and HUGHES) - Prost, J. This is a case about venue and pleading under the...more

McDermott Will & Emery

If it’s Not Legit, You Can’t Admit

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The US Court of Appeals for the Federal Circuit affirmed a district court ruling of non-infringement based on the inadmissibility of unauthenticated printouts of source code as evidence. Wi-LAN Inc. v. Sharp Elecs. Corp.,...more

Weintraub Tobin

Can The U.S. Government Be Liable For Patent Infringement?

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The answer is “Yes” because the U.S. government has waived sovereign immunity for claims of patent infringement. This means the U.S. government can be sued for patent infringement in at least some instances. However,...more

Bradley Arant Boult Cummings LLP

High Court to Review Whether Assignor Estoppel Prevents Assignor from Filing an IPR or Relying on a Prior Invalidity Decision

Last spring in Hologic, Inc. v. Minerva Surgical, Inc., the Federal Circuit ruled that the doctrine of assignor estoppel does not prevent an assignor from lodging a validity challenge of either patent in an IPR proceeding. In...more

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