Holly E. Engelmann

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Holly E. Engelmann, P.C. — Partner, Duane Morris LLP (Austin/Dallas, TX)

Focus areas. Engelmann's practice is concentrated in patent litigation in the Eastern and Western Districts of Texas and at the ITC, with a technology mix centered on telecommunications and electronics rather than pharma or mechanical arts. Her docket and firm bio point to wireless and standard-essential-patent work (4G/LTE), streaming and consumer-electronics devices, and networking/telecom services — including 4G/LTE SEP matters for Ericsson and PanOptis/Optis, a defense of Roku against streaming-device patents, defense of Cisco in a wireless case, and defense of Verizon in an emergency-caller-location patent suit. Duane Morris also lists complex commercial litigation, RMBS, insurance recovery and bankruptcy as secondary experience.

Side preference. The tracked dataset is thin — a single appearance, on the defense side (Lab Technology LLC v. Verizon Communications Inc.) — so it should not be read as a complete picture of her practice. Her disclosed career history runs the other direction: roughly eighteen years (2003–2021) at McKool Smith, "one of the most well-known plaintiff's patent litigation firms," where she worked matters from inception through verdict and settlement, including plaintiff-side SEP and ITC campaigns. She also spent a secondment as in-house counsel at Ericsson, supporting Ericsson's patent assertion and litigation groups on multi-front district court and ITC litigation over wireless technologies. Since joining Duane Morris in 2021 she has appeared principally for operating-company defendants. Net: genuinely two-sided, with a plaintiff-side heritage and a current defense-side orientation.

Firm context. Partner in Duane Morris's Intellectual Property Practice Group since August 2021, joining to help build the then-new Dallas office (firm bio now lists her in Austin). Prior to that, McKool Smith from 2003 to 2021, rising to principal/partner.

Notable matters. The most prominent verifiable result is IOENGINE LLC v. Roku Inc. (W.D. Tex., Judge Alan Albright), where a Duane Morris team led by Tia Fenton and including Engelmann won a complete defense jury verdict in April 2024 — no infringement of two Ioengine patents, with plaintiff having sought $318 million. At McKool Smith she was counsel of record on the Optis Wireless/PanOptis v. Apple SEP litigation, a team effort that yielded large verdicts (a $506 million and a $300 million jury award are reported for the firm's PanOptis cases), though her individual role in those trial outcomes is not separately documented in the sources reviewed. Her tracked Verizon matter was dismissed in December 2024.

PTAB/IPR. No sourced record confirms Engelmann as lead counsel in an IPR/PGR proceeding; her name appears on PTAB-related filings from her McKool Smith years, and her firm Duane Morris maintains a large, highly ranked petitioner-side PTAB practice (a firm-level credential, not hers individually).

Bar/education. Admitted in Texas (2003), New York (2012) and Florida; admitted in the N.D., E.D., S.D. and W.D. Tex. and S.D.N.Y. J.D., SMU Dedman School of Law (2003), where she was an editor of the SMU Law Review; B.A. in mathematics, Whittier College.