Gregory Lantier

Gregory H. Lantier — patent litigation practice summary

Focus areas. Lantier's docket is technology‑agnostic but clustered in a few areas: financial services and software/banking patents (USAA–PNC Bank, the Intellectual Ventures suits against insurers, Dropbox's cloud storage and file‑sharing litigation); medical devices, including radiofrequency nasal/rhinitis ablation technology (Neurent Medical v. The Foundry/Aerin, Medtronic spinal surgery patents) and other device work (Medtronic Vascular v. TMT Systems); chemicals/pharma (Air Products v. Evonik); semiconductors (Intel v. VLSI); wireless/communications (Unified Patents); and consumer products (Essity). Firm and Chambers/IAM descriptions characterize him as handling utility and design patents, trade secrets, copyright, IP ownership and licensing disputes, across medical devices, semiconductors, telecom, biotech/pharma, software, financial services and defense contracting.

Side preference. He works both sides in roughly equal measure — the tracked list is 2 plaintiff / 2 defendant, and his PTAB practice includes both petitioners and patent owners. Much of his identifiable work is defensive: representing operating companies against non‑practicing entities (Dropbox against Motion Offense; Universal Wilde against Secured Mail Solutions; Erie Indemnity, Old Republic and Capital One against Intellectual Ventures). He also prosecutes claims for patent‑holding clients, notably Neurent Medical as petitioner in a multi‑IPR campaign against Aerin/Foundry patents and as defendant in the parallel Delaware action, and Amdocs in its long‑running infringement suit against Openet.

Firm context and PTAB/IPR experience. Lantier spent his career at Wilmer Cutler Pickering Hale and Dorr, where he co‑chaired the firm's Post‑Grant Proceedings Group and its Eastern District of Texas Working Group; the tracked appearances all carry the WilmerHale name. In January 2026 he moved to Sidley Austin as an intellectual property litigation partner in Washington, D.C. (with Alexis Cohen), and docket filings reflect the change of firm. His PTAB practice is substantial and national in scope: he has appeared pro hac vice in dozens of IPRs and in post‑grant reviews (e.g., GMG Products PGR2019‑00035/‑00036), touching Dropbox v. Motion Offense, Neurent v. Foundry/Aerin, Air Products v. Evonik, Medtronic Vascular v. TMT Systems and Intel v. VLSI, and he has handled appeals from Board decisions (Secure Axcess v. PNC Bank; Medtronic v. Robert Bosch Healthcare). IAM Patent 1000 lists him for both litigation and post‑grant proceedings.

Notable results and credentials. Reported wins include the Dropbox/Motion Offense matter — a May 2023 Waco jury invalidating four patents, followed by PTAB unpatentability findings on a fifth, which drew Litigation Daily "Litigators of the Week" recognition in July 2025; the Federal Circuit's June 2025 decision for PNC Bank reversing roughly $223 million in USAA verdicts on § 101 grounds, on which he was part of the WilmerHale team; Secured Mail Solutions v. Universal Wilde, where 243 claims were invalidated on a motion to dismiss and affirmed; and the Erie Indemnity appeal in which the Federal Circuit affirmed invalidity of three Intellectual Ventures patents and found IV did not own a fourth. He was on the briefs for Monsanto at the Supreme Court in Bowman v. Monsanto and in Stanford v. Roche. Education and bar: B.A., George Washington University (2000); J.D., Harvard Law School (2003); law clerk to Chief Judge Rebecca Beach Smith (E.D. Va.); admitted in D.C., Virginia, New York and Wyoming and before the Supreme Court, the Federal Circuit (and Fourth Circuit), the Court of Federal Claims and several district courts. He also teaches patent litigation as an adjunct at American University Washington College of Law. (His inclusion in the Apple/Optis appellate win is documented only at the firm‑team level.)