Gilbert A. Greene

I'll start by researching this attorney's background and practice.

Now let me research the specific tracked cases and PTAB involvement.

Let me verify the Greenthread case roles and outcomes, plus his earlier career.

Gilbert A. ("Bert") Greene — Duane Morris LLP (Austin)

Focus areas. Greene's practice is centered on patent litigation — both enforcement and defense — with IPR/CBM work before the PTAB and a secondary patent prosecution/opinion/portfolio practice in chemical engineering, chemistry and mechanical fields. He is a chemical engineer by training (B.S., UT Austin, 1998), and his firm bio lists litigation experience spanning wired and wireless networking, power-over-ethernet, wireless telecom networks, e-commerce, GIS, middleware, video security, computer graphics, computer hardware, biofuel and petrochemical processing, and DNA analysis. His tracked matters add semiconductor technology: the Greenthread disputes concern CMOS devices with graded dopant/drift-field structures, and Greenthread's broader campaign targets semiconductor power electronics.

Side preference. The structured case list shows one plaintiff-side and two defendant-side appearances, and the public record is consistent with a primarily defense/accused-infringer practice. One caption nuance is worth flagging: in Greenthread, LLC v. Cirrus Logic, Inc., No. 1:23-cv-00369 (W.D. Tex.), deposition transcripts and PTAB filings identify Greene (with Duane Morris colleague W. Andrew Liddell) as counsel for Cirrus Logic, the accused infringer, while McKool Smith represents Greenthread — so the "plaintiff" label in the tracked list appears to reflect the case caption's first-named party rather than Greene's client. Similarly, the Monolithic Power Systems v. Greenthread entry is listed as defendant-side, but the sources reviewed do not clearly establish which party Duane Morris represented there; MPS's IPR petitions in that family were led by Perkins Coie. His firm bio states he has represented both patent holders and accused infringers, and independent directories describe his representative matters as overwhelmingly defense-side — networking/communications equipment manufacturers, retailers, oil and gas companies, and technology companies — plus plaintiff-side work for Vivint LLC in NPE suits brought against it.

Firm context. Greene has been a Duane Morris partner since 2017 and is managing partner of the firm's Austin office; a secondary legal-directory profile lists him as a partner at Norton Rose Fulbright US LLP from 2013 to 2017. He is admitted in Texas (2004), registered with the USPTO (Reg. No. 48,366), and admitted to the Federal Circuit and several district courts. He earned his J.D., with honors, from the University of Texas School of Law (2004), where he was managing editor of the Texas Intellectual Property Law Journal.

Notable matters and PTAB work. He appears regularly in PTAB proceedings. In the Greenthread campaign he is on the petitioner side of the IPR family filed by Cirrus Logic, OmniVision, GlobalFoundries and ams-OSRAM (IPR2024-00016 through -00021 and related proceedings) against Greenthread's CMOS patents; the dispute has also generated a Federal Circuit appeal (No. 26-1634). The parallel MPS/Greenthread IPR family (IPR2024-00468–00470 and -00550–00553) ended in final written decisions invalidating all challenged claims of six semiconductor patents, a result announced by MPS's IPR counsel, Perkins Coie. Other reported results from his bio include a summary judgment of invalidity for a major technology company in an Eastern District of Texas case, dismissal at the pleading stage for an oil and gas client in Delaware, summary judgment of non-infringement for an oil field services client in the Western District of Texas, and a bench-trial damages award plus permanent injunction for Trojan Battery in a trademark case; he is also named on Vivint petitions, including IPR2026-00300. Reported credentials include Best Lawyers "Lawyer of the Year" 2026 (Austin, Litigation–IP and Patent Law), Best Lawyers recognition since 2015, and Super Lawyers listings for 2019–2020.

Sourcing note: the third tracked entry is untitled and could not be identified; no verdict, settlement or licensing outcome specific to Greene's individual role in the Greenthread matters was verifiable beyond the PTAB/Federal Circuit docket activity described above.