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By: Marshall, Gerstein & Borun LLP

Blog Authors

mweiner@marshallip.com
Eric M. Brusca, Ph.D.
Jennifer Burnette
Thomas L. Duston
Joshua T. Elliott
Marshall Gerstein
Julianne M. Hartzell
Benjamin T. Horton
Lynn L. Janulis, Ph.D.
Whitney B.E. Jenkins
Heather R. Kissling
Jeremy R. Kriegel
John R. Labbé
William K. Merkel, Ph.D.
Michael Muczynski
Matt Nealon
Katherine L. Neville, Ph.D.
Kate Nuehring Su
Sandip H. Patel
Ryan N. Phelan
Joseph S. Sakevich
William (Bill) J. Samore
Ryan J. Schermerhorn
Jim Warriner

Latest from PTABWatch

PTABWatch

Fed. Cir. Provides Insight on Conditional Features

By William (Bill) J. Samore
March 25, 2025

In Sierra Wireless v. Sisvel S.P.A., Appeals 2023-1059, -1085, -1089, -1125 (Fed. Cir. Mar. 10, 2025), the Federal Circuit vacated and remanded a PTAB decision that had found claims 1, 2, and 6-8 of U.S. Patent No. 7,869,396 (“the ’396 patent”) obvious.  In particular, the Federal Circuit found that the features in claim 1 of…

PTABWatch

Federal Circuit uses Plain Language for Statutory Interpretation in Lynk Labs

By Whitney B.E. Jenkins
February 27, 2025

In Lynk Labs v. Samsung Electronics, the Federal Circuit determined that “a published patent application can be deemed prior art in an IPR as of the application’s filing date.” The Court affirmed the PTAB’s determination that challenged claims of U.S. Patent No. 10,687,400 (the ’400 patent), which relates to light emitting diodes (LEDs), are…

PTABWatch

PTAB Provides Some Clarity on Artificial Intelligence (AI) Obviousness in IPR Decision

By William (Bill) J. Samore
February 11, 2025

In a decision that underscores the importance of prior art in the context of AI patents, the PTAB recently issued a final decision in Tesla, Inc. v. Autonomous Devices, LLC, IPR2023-01173 (PTAB January 3, 2025), invalidating all challenged claims of U.S. Patent Number 11,055,583 (the “’583 patent”).  The case provides some insight into how the…

PTABWatch

Timeless Expertise: Expert Testimony Precedent in Osseo Imaging

By Whitney B.E. Jenkins
October 18, 2024

To offer expert testimony from the perspective of a skilled artisan in a patent case—like for claim construction, validity, or infringement—a witness must at least have ordinary skill in the art. Our precedent is clear—nothing more is required.

In Osseo Imaging, LLC v. Planmeca USA, Inc., the Federal Circuit addressed the qualifications necessary to…

PTABWatch

Court Limits Collateral Estoppel Based on PTAB Decisions

By mweiner@marshallip.com
October 2, 2024

In ParkerVision, Inc. v. Qualcomm Inc., No. 2022-1755, -2221 (Fed. Cir. Sept. 6, 2024) (“ParkerVision III”), the Federal Circuit held that, due to the difference in burdens of proof in PTAB IPR proceedings and in district court cases, collateral estoppel cannot be applied in a district court case based on findings made by the…

PTABWatch

No Words, No Waiver: No Obligation to Request Rehearing to Preserve Issue for Appeal

By Whitney B.E. Jenkins
October 2, 2024

In Voice Tech Corp v. Unified Patents, LLC, the Federal Circuit affirmed the PTAB’s IPR decision that the challenged claims of Voice Tech’s patent were unpatentable for obviousness, determining that the PTAB’s findings were supported by substantial evidence. At issue were claims 1-8 of U.S. Patent No. 10,491, 679, which relates to use of…

PTABWatch

Give Me ONE Reason: Federal Circuit Requires At Least One Reason for Motivation to Combine

By Whitney B.E. Jenkins
July 31, 2024
What Motivates You question, text words typography written on paper, success  life and business motivational inspirational

In Virtek Vision Int’l. ULC v. Assembly Guidance Systems, Inc. the Federal Circuit reversed in part the PTAB’s final written decision in an IPR petition filed by Assembly Guidance, on the basis that the petition failed to identify a motivation to combine elements present in the prior art, stating that: “A reason for combining must…

PTABWatch

Federal Circuit Abandons Rosen-Durling Test for Design Patent Obviousness

By Ryan J. Schermerhorn & Matt Nealon
July 9, 2024
Federal Circuit Reframes Test for Obviousness of Design Patents -- Main Blog Post Image (6-26-2024)

As discussed in a recent post, On May 21, 2024, the Federal Circuit issued its en banc decision in LKQ Corp. v. GM Global Tech. Operations LLC, significantly impacting design patent law. The court overturned the long-standing Rosen-Durling test, a two-part test used to assess the obviousness of design patents. This decision is expected…

PTABWatch

Federal Circuit Reframes Test for Obviousness of Design Patents

By Jeremy R. Kriegel
June 25, 2024
Federal Circuit Reframes Test for Obviousness of Design Patents -- Main Blog Post Image (6-26-2024)

In LKQ v. GM, a May 21, 2024 en banc decision on an appeal of an IPR final written decision determining that the challenged claim of GM’s U.S. Design Patent No. D797,625 (directed to the design for a vehicle front fender) was not obvious, the Federal Circuit vacated and remanded the PTAB’s decision, overruling the…

PTABWatch

Federal Circuit Holds Recoverability of Attorney’s Fees Does Not Extend to AIA Trials

By Sandip H. Patel
June 6, 2024
Crisis

Can a defendant who prevails in an exceptional patent infringement suit by invalidating the patent in inter partes review (IPR) recover its associated Patent Office-related attorney’s fees? A split three-judge panel of the Federal Circuit recently said no in Dragon Intellectual Property LLC v. Dish Networks LLC, Appeal Nos. 2022-1621, -1777, Slip Op. at…

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