News & Analysis as of

Inter Partes Review (IPR) Proceeding Patent Infringement Estoppel

Sheppard Mullin Richter & Hampton LLP

Don’t Get Lazy, Timely Complete Your Arguments

This Federal Circuit Opinion analyzes statutory estoppel under 35 U.S.C. § 315(e)(1) and examines offensive and defensive arguments related to § 103 obviousness.  Gesture Technology Partners, LLC is the owner of U.S....more

ArentFox Schiff

Federal Circuit Refuses to Extend IPR Estoppel to Unadjudicated Patent Claims

ArentFox Schiff on

In Kroy IP Holdings, LLC v. Groupon, Inc., 127 F.4th 1376 (Fed. Cir. 2025), the Federal Circuit held that patentees in district court are not collaterally estopped from asserting claims that were not immaterially different...more

BakerHostetler

Challenging a Patent via an IPR? Patentees Have an Approved Method to Mitigate the Impact

BakerHostetler on

In response to a lawsuit for patent infringement, often a defendant will file an inter partes review (IPR) challenging the validity of the asserted claims. How can a patentee avoid this scenario?...more

Jones Day

District Court Not Persuaded System Prior Art Evades IPR Estoppel

Jones Day on

On October 25, 2024, the United States District Court for the Eastern District of Pennsylvania ordered Comcast Corporation (“Comcast”) to identify the date on which it learned of each patent, patent application, and printed...more

Proskauer Rose LLP

Ventures in Venue: Selecting the Proper Patent Venue

Proskauer Rose LLP on

Amongst the many decisions an attorney makes throughout litigation, there is one choice that can shape the outcome of a case way before filing a motion, setting discovery and trial strategy, or even calling a witness: venue,...more

Jones Day

PTAB Claim Construction May Be Binding In Later Litigation

Jones Day on

In 2016, the Federal Circuit expressed doubt that claim constructions from the PTAB could give rise to estoppel in later litigation because “the [PTAB] applies the broadest reasonable construction of the claims while the...more

Jones Day

Federal Circuit Clarifies Scope of Patent Owner Estoppel

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The Federal Circuit recently issued a decision in SoftView LLC v. Apple Inc. clarifying the scope of patent owner estoppel set forth in 37 C.F.R. § 42.73(d)(3)(i). 2024 WL 3543902 (Fed. Cir. July 26, 2024). The regulation...more

WilmerHale

Federal Circuit Patent Watch: Ordering In-Person Appearance to Testify Regarding Potential Fraud on the Court is within Court's...

WilmerHale on

Precedential and Key Federal Circuit Opinions - 1.  BACKERTOP LICENSING LLC [OPINION] (23-2367, 23-2368, 24-1016, 24-1017 Prost, Hughes, and Stoll) - Hughes, J. The Court affirmed the District Court’s orders (1)...more

Jones Day

IPR Estoppel in Action

Jones Day on

Recently, District Court Judge Thomas S. Zilly in the Western District of Washington granted Ironburg Inventions Ltd.’s (“Ironburg”) motion for inter partes review (“IPR”) estoppelpursuant to 35 U.S.C. § 315(e)(2), which...more

Jones Day

Reverse Engineered Search Insufficient For IPR/PGR Estoppel

Jones Day on

In GeigTech East Bay v. Lutron Electronics, patent owner GeigTech argued that Lutron should be estopped under 35 U.S.C. § 325(e)(2) from asserting two prior art grounds that it said Lutron could have reasonably raised in its...more

Jones Day

PTAB Doubles Down on Interference Estoppel Issue

Jones Day on

The Patent Trial and Appeal Board held all challenged claims of IGT’s patent unpatentable as obvious over two prior art patents. Zynga Inc. v. IGT, IPR2022-00199-32. In doing so, the PTAB further held that, contrary to...more

Knobbe Martens

Federal Circuit Review - April 2023

Knobbe Martens on

Who Bears the Burden of Proof for IPR Estoppel? In Ironburg Inventions Ltd. v. Valve Corp., Appeal No. 21-2296, the Federal Circuit held that the patentee has the burden of proving that invalidity grounds not raised in a...more

Fish & Richardson

Texas Patent Litigation Monthly Wrap-Up: April 2023

Fish & Richardson on

Four subjects stood out in patent litigation in Texas in April 2023: (1) applicability of the customer-suit exception to the first-to-file rule; (2) the level of ties a reasonable royalty methodology must have to the facts of...more

Snell & Wilmer

Federal Circuit Holds Patent Owners Bear IPR Estoppel Burden of Proof

Snell & Wilmer on

The Federal Circuit recently held, for the first time, that patent owners bear the burden of proof for an Inter Partes Review (“IPR”) Estoppel affirmative defense that an alleged infringer failed to include prior art in a...more

WilmerHale

Federal Circuit Adopts “Skilled Searcher” Standard for IPR Estoppel

WilmerHale on

On April 3, 2023, the Federal Circuit issued an opinion in Ironburg Inventions Ltd. v. Valve Corp., addressing the scope of what invalidity grounds are subject to estoppel pursuant to 35 U.S.C. § 315(e)(2) and the burden of...more

Troutman Pepper Locke

The Party Seeking IPR Estoppel Bears ‎the Burden to Prove Non-Petitioned Invalidity Grounds ‎‎Reasonably Could Have Been Raised

Troutman Pepper Locke on

In the April 3, 2023 decision in Ironburg Inventions Ltd. v. Valve Corporation, 21-2296, Doc. 66, the Federal Circuit provides crucial guidance regarding inter partes review (IPR) estoppel under 35 U.S.C. § 315(e)(2). In...more

Kilpatrick

PTAB Alert: Estoppel and the “Skilled Searcher” Standard

Kilpatrick on

Yesterday, in Ironburg Inventions Ltd. v. Valve Corp., Case No. 21-2296 (Fed. Cir. Apr. 3, 2023), the Federal Circuit held that for estoppel to apply under 35 U.S.C. § 315(e)(2), a patent holder must prove, by a preponderance...more

Knobbe Martens

Who Bears the Burden of Proof for IPR Estoppel?

Knobbe Martens on

IRONBURG INVENTIONS LTD. v. VALVE CORP. Before Lourie, Clevenger, and Stark.  Appeal from the United States District Court for the Western District of Washington. Summary: The patentee has the burden of proving that...more

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

[Webinar] 2022 PTAB Year in Review: Analysis and Trends - February 28th, 1:00 pm - 2:00 pm EST

Speakers will offer updates, case summaries, and analysis of the significant 2022 PTAB guidance, actions, and rulings. Topics include: the Director’s 2022 Fintiv guidance, PTAB discretionary denial, the use of applicant...more

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

Federal Circuit Appeals from the PTAB and ITC: Summaries of Key 2022 Decisions: California Institute of Technology v. Broadcom...

Caltech sued Broadcom and Apple for infringement, asserting three of its data transmission patents against Broadcom’s WiFi chips and certain Apple products that incorporate those chips. Apple then filed IPR petitions...more

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

Federal Circuit Appeals from the PTAB and ITC: Summaries of Key 2022 Decisions

As part of the recovery from the global COVID-19 pandemic, the U.S. Court of Appeals for the Federal Circuit took steps to return to normal operations. It began requiring live oral arguments in August 2022 and, by November,...more

McDermott Will & Emery

[Ongoing Program] PTAB Session: Strategic Considerations Before Filing IPR Petitions - April 21st, 10:00 am - 11:00 am JST

We are committed to providing insightful commentary on IP developments from around the world to our Japanese clients. In light of that effort, we are continuing our free monthly webinar series, McDermott IP Focus. During...more

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

[Webinar] Federal Circuit Appeals from the PTAB and ITC: Summaries of Key 2022 Decisions - February 2nd, 1:00 pm - 2:00 pm EST

In conjunction with the release of the firm's year-in-review report, speakers will offer case summaries and analysis of the significant 2022 appellate rulings discussed in the report. Topics of the featured intellectual...more

McDermott Will & Emery

IPR Estoppel Applies to Claim Not Addressed During Pre-SAS Proceeding

In the companion district court case to the Supreme Court’s 2019 Thryv v. Click-to-Call decision regarding the scope of review for inter partes review (IPR) decisions, the US Court of Appeals for the Federal Circuit addressed...more

Knobbe Martens

IPR estoppel “under an unusual set of facts”

Knobbe Martens on

Before Stoll, Schall, and Cunningham. Appeal from the United States District Court for the Western District of Texas....more

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