Lucy Yen

I'll research this attorney before drafting.

Let me verify the tracked case and check for PTAB/IPR history and prior firms.

Let me check for prior firm history and confirm her USPTO registration status.

Lucy Yen — Patent Litigation Practice Summary

Specialty / focus areas. Yen's practice at Wilson Sonsini Goodrich & Rosati centers on intellectual property, antitrust, and complex commercial litigation, with substantial trial work for semiconductor, technology, and life sciences clients. Her verifiable patent docket skews toward hardware and electronics: molded-power-inductor components for mobile devices (Cyntec v. Chilisin), secure payment tokenization and verification technology (Cortex MCP v. Visa), wireless/standards-essential-adjacent telecom patents (ASUS Computer Int'l v. InterDigital), and construction machinery (Wirtgen America v. Caterpillar). Her firm bio also cites telecom-sector arbitration awards exceeding $100 million and internet-related counseling. Nothing in the sourced record shows a pharma/ANDA or life-sciences patent docket, despite the general "life sciences" reference in her firm biography.

Side preference. The structured tracker shows 0 plaintiff-side and 2 defendant-side appearances, both entries arising from the same matter, Cortex MCP, Inc. v. Visa, Inc. — i.e., a large operating company defending against a patent owner's infringement claims. That defense-side posture is consistent with her other verified engagements (Visa, Caterpillar, ASUS/InterDigital, Google). She is not, on this record, a regular NPE/PAE-side filer. The caveat is that her docket is genuinely mixed in practice: she was part of the Wilson Sonsini team that prosecuted Cyntec's infringement claims as plaintiff, and she appears as counsel for plaintiff Caterpillar in Wirtgen. So the tracked 0/2 split overstates any one-sided posture.

Firm context. She is a partner in Wilson Sonsini's New York office (California State Bar No. 224559; the firm lists her in New York). The tracker's "of counsel" and "Counsel" role labels for the Cortex matter predate or conflict with her current partner title; no prior law firm history is verifiable from firm, court, or press sources reviewed. Third-party aggregator profiles (e.g., Martindale, lawyers.bio) contain internally inconsistent data — including a variant listing her as a 1998 Boston College Law graduate in San Diego — which appears to be stale or erroneous; the firm biography should be treated as authoritative.

Notable cases and outcomes. Cyntec Co. v. Chilisin Electronics (N.D. Cal.) is her most documented patent result: a September 2021 jury verdict of infringement and willfulness on U.S. Patent Nos. 8,922,312 and 9,481,037, with lost profits plus a 5% reasonable royalty; a May 2022 permanent injunction and treble-damages award; and a March 2026 jury win rejecting Chilisin's obviousness challenge to the same patents. In ReactX LLC v. Google LLC (L.A. Superior Court, June 2025) she was part of the team that obtained a complete defense verdict against a $1.3 billion claim — though that was a contract/trade-secret case, not a patent case. In Cortex MCP, Inc. v. Visa, Inc., she supported Visa's successful venue transfer from the W.D. Tex. to the N.D. Cal. (November 2023); the case was stayed in July 2024 pending IPR resolution and remains stayed on appeal.

PTAB / IPR experience. Flagging this as unconfirmed rather than established: the five Visa v. Cortex MCP IPR petitions (IPR2024-00486 through -00490) were filed by Wilson Sonsini, but the counsel of record on the petitions were Matthew Argenti, Michael Rosato, Patrick Medley, and Joseph Baillargeon. Yen's documented role is on the district court team (venue-transfer declaration, settlement conference, stay briefing). No source reviewed shows her personally appearing as IPR/PGR counsel of record, so no regular PTAB appearance pattern can be substantiated.

Bar / education. J.D., Boston College Law School, 2002 (magna cum laude); B.A., Harvard University, 1999; admitted in California, New York, and the District of Columbia, plus the C.D. Cal., N.D. Cal., and S.D.N.Y. No USPTO registration number was located, and her bar number is a State Bar of California number — the sources reviewed do not establish that she is a registered patent attorney.