Nathaniel J. St. Clair, II

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Nathaniel J. St. Clair, II ("Nate St. Clair") — Patent Litigation Practice Summary

Specialty and focus. St. Clair is an IP litigator and counselor based in Dallas whose practice centers on patent litigation, patent portfolio licensing and management, infringement and invalidity analyses, patentability assessments, and IP risk/strategy work, with stated emphasis on the electrical and mechanical arts (Jackson Walker firm announcements; Chambers USA department profile). He also handles trademark litigation and portfolio counseling, including managing Goldman Sachs' worldwide trademark portfolio and advising J.C. Penney on domestic and international IP matters. His USPTO registration data shows a substantial prosecution-side docket for university and institutional clients—University of Houston System, University of North Texas, UT System, Texas A&M, Tufts, and KidKraft among them—so the profile spans litigation and prosecution rather than pure litigation.

Side preference. He works both sides, though his public docket skews toward defending operating companies against patent monetization/NPE campaigns. The tracked case list is split 1–1 (one plaintiff-side, one defendant-side), but the verifiable litigation record is heavier on defense: Trellix/Musarubra, Google, Semtech, Keste, Quad/Graphics, Posty Cards, and other defendants in the CTP Innovations printer-technology campaigns. His plaintiff-side appearances tend to be company-v-company matters (e.g., Medecision Inc. v. My Health Inc., CGC Royalty Investments I v. Bluewater Moorings, Montgomery Capital Advisers) rather than NPE-style assertion. Client names appearing in firm materials—Dell, Goldman Sachs, Bank of America, Walmart, J.C. Penney—are operating companies, not asserters.

Firm context. St. Clair is a partner at Jackson Walker LLP in Dallas and serves as firmwide head/chair of the firm's Intellectual Property practice group. He is a registered patent attorney (USPTO Reg. No. 57,498) and has practiced at Jackson Walker since at least 2014. Note that the tracked case list attributes one plaintiff-side, lead-counsel appearance to Finnegan, Henderson, Farabow, Garrett & Dunner; I found no public record corroborating a Finnegan affiliation for this attorney, and Finnegan's Dallas office was not opened until 2026, so that attribution should be treated as unverified. He should also be distinguished from St. Clair Intellectual Property Consultants, Inc., a separate patent-holding entity frequently appearing in search results.

Notable matters and PTAB activity. The two tracked cases in the dataset are listed without names, so they cannot be identified here. The most prominent verifiable matter is In re Taasera Licensing LLC Patent Litigation (E.D. Tex., Judge Gilstrap's first MDL), where he represented Musarubra US LLC d/b/a Trellix against eight-figure damages claims; the case resolved shortly before trial for a fraction of the amount sought (Jackson Walker). He also represents Google LLC in Virtamove Corp. v. Google LLC (W.D. Tex. 2025). On the PTAB side, he appeared as backup counsel in CBM2014-00082 (Travelocity/Priceline/Expedia v. Cronos Technologies) and is described by the firm as having adversarial PTAB experience; the record does not show him as a routine lead petitioner in IPR/PGR proceedings. Recognition includes Patexia's 2026 top-100 patent attorney ranking, Managing IP "Patent Star" since 2024, a 2024 shortlist for Managing IP's Litigator of the Year–Texas, and Best Lawyers/Super Lawyers listings.

Bar and education (brief). J.D., Marquette University Law School (2004); registered with the USPTO (Reg. No. 57,498) and admitted in Texas (State Bar No. 24071564). One discrepancy worth noting: some directory sources list Texas licensure as 2010 while others cite 2004 as his year of admission to practice generally, so the Texas admission date is not uniformly sourced.