William D. Ellerman

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Let me dig into the specific tracked cases and outcomes.

William D. Ellerman — Patent Litigation Practice Summary

Focus areas. Ellerman's patent work centers on electronics and semiconductor technologies: microprocessor architecture and power management, memory/cache design, and semiconductor device patents (the Palisade Technologies assertions against Micron; the Daedalus Prime suits against Marvell and Google over Intel-origin processor patents; the Advanced Cluster Systems parallel-computing suits against Intel and AMD). He also handles video streaming (VideoShare v. Google) and wireless/mobile matters (Palisade Technologies v. T-Mobile USA, and, per his firm bio, a Wi-Fi patent campaign for a public university and suits against major mobile-device makers). His firm describes a broader IP and complex-commercial practice spanning trade secrets, contract, securities, banking, oil and gas, and First Amendment work, with companion appellate practice (Fifth Circuit, Federal Circuit, Texas Supreme Court; briefs to the U.S. Supreme Court).

Side preference. The tracked data is predominantly plaintiff-side (9 plaintiff vs. 2 defendant appearances), and the plaintiff work is largely patent-owner/NPE-side assertion — Palisade Technologies, Daedalus Prime, VideoShare, and Advanced Cluster Systems — often in the Western District of Texas, where he is also used as local counsel (Advanced Cluster Systems v. Intel and v. AMD). He does take defense-side and commercial matters as well (one tracked defendant-side case each under Cherry Johnson Siegmund James and Dykema Gossett), and his own firm bio states his caseload spans both plaintiff and defense work.

Firm context and notable matters. He is currently a partner at Cherry Johnson Siegmund James PLLC (Dallas/Waco, Texas), a Waco-centered patent shop. He previously practiced at Jackson Walker LLP (business/appellate litigation), Shore Chan DePumpo LLP, and McKool Smith, which announced his arrival as a Principal in Dallas in August 2022. Notable tracked matters include: Palisade Technologies, LLP v. Micron Technology (W.D. Tex., filed Oct. 2024), where he is identified as lead attorney and the parallel Micron IPRs (IPR2025-01559/‑1560/‑1561) were terminated pre-institution on the parties' settlement motion in early 2026; Palisade Technologies LLP v. T-Mobile USA (lead counsel); Advanced Cluster Systems, Inc. v. Intel Corp. and v. Advanced Micro Devices, Inc. (W.D. Tex., local counsel; Intel/AMD IPRs IPR2025‑00913–00916 were instituted after the Director denied ACS's discretionary-denial request, with district trial set for late 2026); and Daedalus Prime LLC v. Marvell Technology, Inc. (W.D. Tex., filed Sept. 2025). His firm bio reports a $25.9 million jury verdict as first-chair trial counsel in a video-streaming patent case and National Law Journal Top 100 Verdicts recognition (2021); a court filing confirms his appearance for plaintiff VideoShare, LLC in VideoShare LLC v. Google LLC (W.D. Tex.), though the sources reviewed do not tie that verdict, by caption, to that specific case.

PTAB/IPR and credentials. He appears with some regularity in AIA post-grant proceedings as district-court-side counsel for patent owners, including the ACS IPRs (as part of the ACS team) and the Palisade IPRs, and his firm bio notes he represented 12 public universities as amici on sovereign immunity in IPR. The sources reviewed do not list him as a registered patent practitioner before the USPTO. Education and bar: J.D., Baylor University School of Law (1998, summa cum laude, first in class); B.A., Tulane University (cum laude); licensed in Texas since 1998 and admitted to the N.D., E.D., and W.D. Tex., the Fifth and Federal Circuits, and the U.S. Supreme Court.

Note: several docket entries in the tracked data (Nelson Bumgardner Conroy; Dykema Gossett) are not corroborated by the public sources reviewed, and some case captions were unavailable, so those appearances are reported as tracked rather than independently verified.