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Appeals Patents Expert Testimony

Knobbe Martens

No Error: The Board Committed No Procedural Error by Relying on Evidence Outside of the Prior Art Reference

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SAGE PRODUCTS, LLC v. STEWART [OPINION] - Before Reyna, Cunningham, and Stark. Appeal from the United States Patent and Trademark Office, Patent Trial and Appeal Board. The Board did not abuse its discretion by relying on...more

Proskauer - The Patent Playbook

Federal Circuit Affirms That Expert Testimony Must Be Based on Competent and Reliable Evidence

Mirror Worlds Technologies, LLC (“Mirror Worlds”) sued Meta Platforms, Inc. (“Meta”)—formerly Facebook, Inc.—in the Southern District of New York for patent infringement. The lawsuit involved three patents related to storing,...more

Baker Botts L.L.P.

Patent Apportionment: Anything You Say in a License Agreement May Be Used Against You in a Court of Law

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Over the last several years, the Federal Circuit has increasingly scrutinized patent litigants’ reliance on “comparable licenses” as a means for calculating a reasonable royalty, including whether the license needs to be...more

McDermott Will & Emery

Construing Unambiguous Claim Language and Qualifying Challenged Expert as POSITA

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Addressing the issues of claim construction and the requisite expert qualifications to testify on obviousness and anticipation, the US Court of Appeals for the Federal Circuit vacated a Patent Trial & Appeal Board decision...more

Vorys, Sater, Seymour and Pease LLP

The Precedent: The Federal Circuit Remands and Reassigns District Court Patent Infringement Case to a New Judge

In this edition of The Precedent, we outline the decision in Trudell Medical International Inc. v. D R Burton Healthcare LLC. The U.S. Court of Appeals for the Federal Circuit recently affirmed in part, reversed in part and...more

Baker Botts L.L.P.

The Federal Circuit Tackles the Role of Expert Opinions in Patent Damages in EcoFactor Inc. v. Google, LLC

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The Federal Circuit rarely decides cases en banc. For example, in 2024, the Court only heard one en banc case. Stunningly, on September 25, 2024, the Federal Circuit granted Google’s petition for rehearing en banc in the case...more

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

2024 Federal Circuit IP Appeals: Summaries of Key 2024 Decisions

2024 brought exciting developments at the Federal Circuit. The court issued its first en banc decision in a patent case in five years in LKQ, which significantly altered the standard for proving obviousness of a design...more

McDermott Will & Emery

Judicial Bias and Erroneous Admission of Expert Testimony Prompt Case Reassignment

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The US Court of Appeals for the Federal Circuit reversed a district court’s decision to admit expert testimony and remanded the case to a different judge, noting that “from the moment this case fell in his lap, the trial...more

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

2024 PTAB Year in Review: Analysis & Trends – 2024 PTAB Case Highlights

Abuse of Process and/or Sanctions – 37 C.F.R. § 42.12 - Spectrum Solutions LLC v. Longhorn Vaccines & Diagnostics, LLC, IPR2021-00847, IPR2021-00850, IPR2021-00854, IPR2021-00857 & IPR2021-00860 - Decision...more

Irwin IP LLP

Federal Circuit Opts Not to Play its REVERSE [DOE] Card 

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Steuben Foods, Inc. v. Shibuya Hoppmann Corp., No. 23-1790 (Fed. Cir. 2025) - On January 24, 2025, the Federal Circuit considered the “long mentioned but rarely applied” reverse doctrine of equivalents (“RDOE”) defense. ...more

McDermott Will & Emery

Bottling the Truth: Equivalence and Reverse Equivalence

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The US Court of Appeals for the Federal Circuit ruled that the “substantially the same way” comparison in connection with a doctrine of equivalents (DOE) analysis involving a means-plus-function claim limitation should focus...more

Kilpatrick

5 Key Takeaways | Building a Winning Evidentiary Record at the PTAB (and Surviving Appeal)

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Kilpatrick partners John Alemanni and Justin Krieger recently presented a CLE addressing “Building a Winning Evidentiary Record at the PTAB (and Surviving Appeal).”...more

McDermott Will & Emery

Equivalence Requires Element-by-Element Proof With Linking Argument

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The US Court of Appeals for the Federal Circuit affirmed a district court determination that a patent owner had not provided the “particularized testimony and linking argument” required to demonstrate equivalence under the...more

Baker Botts L.L.P.

Third Quarter 2024 Federal Circuit Law Update

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Since serving as a Federal Circuit clerk, Michael Hawes has monitored that court's precedential opinions and prepares a deeply outlined index by subject matter (invalidity, infringement, claim construction, etc.) of relevant...more

Schwabe, Williamson & Wyatt PC

Latest Federal Court Cases - September 2024 #4

EcoFactor, Inc. v. Google LLC, Appeal No. 2023-1101 (Fed. Cir. Sept. 25, 2024) The Federal Circuit’s only precedential opinion this week was a rare order that granted en banc review of a prior panel decision. Here, the...more

McDermott Will & Emery

The $X Factor: Demystifying Damages Calculations

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The US Court of Appeals for the Federal Circuit affirmed a district court’s decision to deny a defendant’s motion for a new trial on damages, finding that the plaintiff’s damages expert sufficiently showed that prior license...more

McDermott Will & Emery

Is Evidence of All Claimed Elements in Prior Art Enough? Not Without Motivation to Combine

The US Court of Appeals for the Federal Circuit reversed a Patent Trial & Appeal Board obviousness decision, finding that disclosure in the prior art of all recited claim elements across multiple references, without more,...more

McDermott Will & Emery

No Money, Mo’ Problems: Speculative Damages Award Cannot Stand

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The US Court of Appeals for the Federal Circuit upheld a district court’s claim construction and jury instructions but reversed a premature judgment as a matter of law (JMOL) on obviousness and an imprecise damages award....more

Schwabe, Williamson & Wyatt PC

Latest Federal Court Cases - October 2023 #3

Cyntec Company, Ltd. v. Chilisin Electronics Corp., Appeal No. 2022-1873 (Fed. Cir. Oct. 16, 2023) In this week’s Case of the Week, the Federal Circuit reversed and remanded a California district court’s judgment as a...more

McDermott Will & Emery

Breaking Up Is Hard to Do: Validity Upheld Based on Expert Separation Testimony

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The US Court of Appeals for the Federal Circuit affirmed a district court decision finding that two patents covering enantiomerically pure compositions of the psoriasis drug Otezla® (apremilast) were valid and one patent...more

McDermott Will & Emery

Bad Connection: Claim Construction Argument without Explanation Given No Weight

McDermott Will & Emery on

The US Court of Appeals for the Federal Circuit affirmed a Patent Trial & Appeal Board (Board) obviousness decision after finding that the patent owner failed to explain how its cited extrinsic evidence supported its proposed...more

McDermott Will & Emery

Game Over when Expert Fails to Use Correct Claim Construction

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The US Court of Appeals for the Federal Circuit concluded that a district court did not abuse its discretion in striking expert testimony where the testimony did not rely on an agreed and court-adopted claim construction....more

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

PTAB Strategies and Insights Newsletter: May 2022: Split Panel Weighs General Skepticism Differently in Obviousness Inquiry

In a recent opinion by the Federal Circuit, Auris Health, Inc. v Intuitive Surgical Operations, Inc., Case 2021-1732, the panel split on the weight of general industry skepticism in an obviousness analysis and split on...more

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

PTAB Strategies and Insights Newsletter: May 2022

The PTAB Strategies and Insights newsletter provides timely updates and insights into how best to handle proceedings at the USPTO. It is designed to increase return on investment for all stakeholders looking at the entire...more

McDermott Will & Emery

Game Reset: Extrinsic Evidence Can’t Limit Claim Scope Beyond Scope Based on Unambiguous Intrinsic Evidence

The US Court of Appeals for the Federal Circuit reversed a district court’s grant of summary judgment of noninfringement after concluding that the district court erred by relying on expert testimony to construe a claim term...more

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