Eugene Goryunov

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Professional Summary — Eugene Goryunov

Focus areas. Goryunov's practice is anchored in post-grant practice at the USPTO and pairs with district court and Federal Circuit litigation. Firm bios describe him as a first-chair trial lawyer in IPR/PGR proceedings for both petitioners and patent owners, handling technologies spanning networking, wireless/mobile telephony, computers and software, medical devices and therapeutics, consumer goods, and pharmaceuticals. The tracked docket is consistent with that breadth: standards/telecom and consumer-electronics matters (X One v. Uber, Atlas Global v. TP-Link), financial-services software (Cyberfone v. E*TRADE), and an ANDA/pharma action (Actavis Elizabeth v. Novartis). His pre-law career as a software engineer at Cardinal Health and a B.S. in computer science align with the software and networking docket, and he has written and spoken regularly on AI-related patent issues, including inventorship and prosecution.

Side preference. He works both sides rather than occupying a single lane. The tracked appearances split 7 plaintiff / 9 defendant. On the defense side he has represented large operating companies (Uber, TP-Link, E*TRADE, JPMorgan Chase, Compass Bank) and as co-defendant with Novartis; on the plaintiff/petitioner side, the IBM matters against Intellectual Ventures account for most of the plaintiff-side entries, with Apple v. Fintiv as a further petitioner-side matter. In PTAB work specifically, firm biographies emphasize representation of both petitioners and patent owners.

Firm context. The bulk of his tracked appearances (14) are from Kirkland & Ellis, where he was a Chicago partner and central to building the firm's post-grant review practice. He then moved to Haynes and Boone as a Chicago partner and IPR team lead (one tracked appearance), to Brown Rudnick as a Washington, D.C. partner and co-chair of its PTAB practice in June 2025 (one tracked appearance), and is now identified by Chambers USA 2026, Best Lawyers, and the firm's own site as an attorney at Cherry Johnson Siegmund James PC in Washington, D.C. The firm attribution in the tracked case list reflects the firm at the time of each appearance.

Notable matters and PTAB experience. The most prominent tracked matters are the IBM v. Intellectual Ventures II series (IBM as petitioner/plaintiff across multiple entries, with Goryunov variously as back-up counsel, of counsel, and counsel), the related Compass Bank v. Intellectual Ventures II matter (pro hac vice), Actavis Elizabeth v. Novartis, and lead-counsel roles in X One v. Uber, Atlas Global v. TP-Link, and Cyberfone v. E*TRADE. I was not able to verify specific verdicts, settlements, or Federal Circuit outcomes for these from the sources reviewed, so no results are asserted here. PTAB/IPR work is clearly central: published bios state he filed some of the first-ever IPR petitions, has appeared in or led more than 500 USPTO proceedings, is a co-founder of the PTAB Bar Association, and authored Trial Lawyer's Guide to Post-Grant Patent Proceedings (LexisNexis). His USPTO registration number (61,579) appears on numerous IPR powers of attorney.

Bar and education. Admitted in Illinois and registered with the USPTO; court admissions include the Federal Circuit and the Eastern District of Texas. J.D., UIC John Marshall Law School, 2008 (cum laude); B.S., Computer Science, DePaul University, 2001.

Disambiguation note: search results also surface an unrelated patent agent named Eugene at Cantor Colburn; the profile above relies only on sources tied to this attorney's litigation practice.