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In IOENGINE, LLC v. Ingenico Inc. (Fed. Cir. 2025), the Federal Circuit narrowed the scope of IPR estoppel under 35 U.S.C. § 315(e)(2), which precludes an IPR petitioner from asserting in court that a patent claim “is invalid...more
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
Director Jason A. Fitzsimmons and Counsel Richard A. Crudo will present the “Developments in IPR Estoppel” webinar on Tuesday, December 5, 2023, at 1:00 PM ET. The possibility of being estopped from asserting prior art in...more
A judge in the District of Delaware has ruled that an estoppel under 35 U.S.C. § 315(e)(2) does not apply to prior-art products, even if those products are “cumulative” of prior-art patents or printed publications that were...more
Inter partes review (IPR) proceedings raise complex estoppel issues that courts are grappling with and patent litigants must consider. Because patent challengers can assert invalidity in three different tribunals (the...more
[co-author: Jamie Dohopolski] Love it or hate it, ignore the USPTO Patent Trial and Appeal Board (PTAB) at your peril. The introduction of the PTAB as part of the America Invents Act over ten years ago has forever changed...more
Last year, the continued global COVID-19 pandemic forced American courts to largely continue the procedures set in place in 2020. The U.S. Court of Appeals for the Federal Circuit was no exception. It briefly returned to live...more
[co-author: Jamie Dohopolski] Last year, the continued global COVID-19 pandemic forced American courts to largely continue the procedures set in place in 2020. The U.S. Court of Appeals for the Federal Circuit was no...more
The Eastern District of Texas has rejected a plaintiff’s argument that if a patent owner concedes in an inter partes review (IPR) that a prior art reference discloses all elements of a patent claim, the reference necessarily...more
Joining an IPR Triggers IPR Estoppel Only for Instituted Grounds - In Network-1 Technologies, Inc. v. Hewlett-Packard Company, Hewlett Packard Enterprise Company , Appeal No. 18-2338, the Federal Circuit held that a party...more
NETWORK-1 TECHNOLOGIES, INC. v. HEWLETT-PACKARD COMPANY, HEWLETT PACKARD ENTERPRISE COMPANY - Before Prost, Newman, and Bryson. Appeal from the United States District Court for the Eastern District of Texas. Summary: A...more
The availability of post-grant proceedings at the Patent Trial and Appeal Board (PTAB) has changed the face of patent litigation. This monthly digest is designed to keep you up-to-date by highlighting interesting PTAB,...more
When Congress created inter partes review (“IPR”) proceedings in the Leahy-Smith America Invents Act, it included an estoppel provision to avoid duplicative validity challenges against the same patent claims.1 As set forth in...more
Chief Judge Stark granted a patent owner’s motion for summary judgment of inter partes review (IPR) estoppel, holding that obviousness defenses based on a prior art product could not be asserted because a prior art...more
A Central District of California judge recently granted summary judgment of no obviousness based on inter partes review (IPR) estoppel because the only prior art references used to challenge patent validity could have been...more
One area of estoppel arising from an unsuccessful AIA petition that remains poorly understood relates to prior art that is described both in a printed publication or patent and also was in use by others, such as to create...more
A Central District of California judge has clarified his prior ruling on summary judgment that estoppel under 35 U.S.C. § 315(e)(2) that applies to certain obviousness invalidity grounds raised by Defendants. In the prior...more
In 2018, the U.S. Court of Appeals for the Federal Circuit docketed close to 600 appeals from the U.S. Patent and Trademark Office (USPTO). That is the second highest number since starting to hear post-American Invents Act...more
Last year, the Federal Circuit in Shaw Industries Group, Inc. v. Automated Creel Systems, Inc. articulated that a petitioner is not estopped from relying on a ground on which the Patent Trial and Appeal Board (PTAB) declined...more
In a Final Written Decision in Johns Manville Corp. v. Knauf Insulation, Inc., IPR2016-00130, Paper 35 (P.T.A.B. May 8, 2017), the PTAB found that petitioner Johns Manville (JM) was not estopped from raising its own company...more