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Expert Witness Patent Trial and Appeal Board Patent Invalidity

Mayer Brown

Reinvigorated Enforcement of Evidentiary Rules and the Permissible Uses of General Knowledge in Inter Partes Review

Mayer Brown on

On July 31, 2025, the Acting Director of the US Patent and Trademark Office (USPTO) issued a significant memorandum that alters the evidentiary landscape for inter partes review (IPR) proceedings before the Patent Trial and...more

IMS Legal Strategies

IMS Expert Insights: An Expert Witness Perspective on Inter Partes Review of Patents

IMS Legal Strategies on

An inter partes review (or IPR) of a patent is a trial proceeding conducted by the Patent Trial and Appeal Board (PTAB) when there is a challenge to patentability. The procedure for conducting IPRs took effect in 2012 and...more

McDonnell Boehnen Hulbert & Berghoff LLP

Cornell Research Foundation, Inc. v. Vidal (Fed. Cir. 2022)

Last month in Cornell Research Foundation, Inc. v. Vidal, the Federal Circuit affirmed the Patent Trial and Appeal Board's determinations in six inter partes review proceedings that invalidated the challenged claims for being...more

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

2021 PTAB Year in Review: Analysis & Trends

[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

Farella Braun + Martel LLP

How Defense Strategies Can Go Awry When Pursuing Concurrent PTAB Relief in Financial Services Patent Litigation

United States Automobile Association (USAA), a financial services company that provides insurance, banking, investment, and retirement products and services for members of the military and their families, filed a surprising...more

Jones Day

District Court deference to PTAB regarding priority claim? Not necessarily.

Jones Day on

In instituting IPR of a particular patent, the PTAB found that the patent was not entitled to its priority claim, thus opening it up to invalidity attacks. However, because the PTAB’s decision was not being challenged in the...more

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