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Patent Validity Assignor Estoppel Appeals

McDermott Will & Emery

Claim Cancelation Limits but Doesn’t Prohibit Assignor Estoppel Defense

McDermott Will & Emery on

On remand from the Supreme Court, the US Court of Appeals for the Federal Circuit reconsidered the boundaries of the doctrine of assignor estoppel. The Federal Circuit found that the patent assignor was estopped from...more

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

Federal Circuit Appeals from the PTAB and ITC: Summaries of Key 2021 Decisions

[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

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

2019 Report: Federal Circuit Appeals from the PTAB - Summaries of Key 2018 Decisions: Arista Networks, Inc. v. Cisco Sys., Inc.,...

The inventor on the patent, Dr. Cheriton, was employed by Cisco as a technical advisor and chief product architect at the time he filed the application that led to the patent. Dr. Cheriton assigned all rights to the...more

Knobbe Martens

Perhaps Assignor Estoppel Survives at the PTAB…via the District Court

Knobbe Martens on

A preliminary decision in the District Court of Delaware introduces the possibility that a patentee’s victory on assignor estoppel in the district court could quash a co-pending IPR proceeding at the PTAB. Assignor estoppel...more

Knobbe Martens

Federal Circuit Review - December 2018

Knobbe Martens on

Assignor Estoppel Does Not Apply in the IPR Context - In Arista Networks, Inc. v. Cisco Systems, Inc., Appeal Nos. 2017-1525, 2017-1577, the Federal Circuit held that the plain language of 35 U.S.C. § 311(a) unambiguously...more

Knobbe Martens

Arista Networks, Inc. v. Cisco Systems, Inc.

Knobbe Martens on

Federal Circuit Summary - Before Prost, Schall, and Chen. Appeal from the Patent Trial and Appeal Board. Summary: The plain language of 35 U.S.C. § 311(a) unambiguously leaves no room for assignor estoppel to apply in...more

Mintz - Intellectual Property Viewpoints

PTAB Invalidates Two Cisco Patents Found Valid and Infringed at the ITC

The Patent Trial and Appeal Board (“PTAB”) issued Final Written Decisions regarding Cisco’s U.S. Patent Nos. 6,377,577 (the “’577 Patent”) and 7,023,853 (the “’853 Patent”) on May 25, 2017 and U.S. Patent No. 7,224,668 (the...more

Knobbe Martens

Medtronic v. Robert Bosch – Has the Federal Circuit closed the door on reviewing IPR institution decisions?

Knobbe Martens on

On October 20, 2016, the Federal Circuit issued yet another opinion finding that the Patent Trial and Appeal Board’s decisions related to the institution of an inter partes review (IPR) are not subject to judicial review. ...more

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