Holly Engelmann, P.C.


  • Holly Engelmann, P.C.
  • Phone: +1 214 257 7226
    Fax: +1 214 292 9454

    Import to Address Book

  • Duane Morris LLP
    100 Crescent Court, Suite 1200
    Dallas, TX 75201

Holly Engelmann, P.C. is a results-oriented and client-focused litigation and trial attorney with nearly 20 years of experience handling complex litigation. Holly’s practice focuses on litigation, particularly patent litigation, but also extending to complex commercial litigation, residential mortgage-backed securities litigation, insurance recovery, and bankruptcy. With clients drawn from the ranks of industry leaders and private equity firms, she has amassed substantial experience managing high-stakes litigation from client inception through verdict and settlement.

Holly also served as in-house legal counsel while on secondment at Ericsson, working with that company’s patent assertion and litigation groups. In that capacity, she managed internal business and legal aspects of preparing for and participating in multifront patent litigation in federal district court and the ITC related to Ericsson’s wireless technologies.

Holly is a graduate of Southern Methodist University, Dedman School of Law, where she was an editor of the Southern Methodist University Law Review, inductee to The Order of Barristers, and Best Advocate of the Year award recipient. During law school, Holly interned for Justice Craig T. Enoch of the Supreme Court of Texas, and Justice David W. Chew of the Eighth Court of Appeals of Texas, and served as Ticketmaster’s first legal intern.

Holly is a Steering Committee Member of the Duane Morris Women’s Impact Network for Success (“WINS”), WINS Programming Chair (Dallas office), and Steering Committee Member of the Duane Morris Diversity, Equity, and Inclusion 2022 Retreat.

Prior to law school, Holly taught high school mathematics and served as the cheerleading coach and class advisor at John Glenn High School in Norwalk, California.

Holly earned a B.A. in mathematics from Whittier College while also serving as the Sports Editor of The Quaker Campus School Paper and was a player and captain of the basketball team.


  • Texas
  • Florida
  • New York
  • U.S. District Court for the Northern District of Texas
  • U.S. District Court for the Eastern District of Texas
  • U.S. District Court for the Southern District of Texas
  • U.S. District Court for the Western District of Texas
  • U.S. District Court for the Southern District of New York


  • Southern Methodist University, Dedman School of Law, J.D.
    - Editor, Southern Methodist University Law Review
  • Whittier College, B.A.


  • Duane Morris LLP
    - Partner, 2021-present
  • McKool Smith
    - Partner/Associate, 2003-2021

Professional Activities

  • American Bar Association

  • Dallas Bar Association

  • Federal Bar Association

  • University of North Texas, College of Law
    - Adjunct Professor of Practice Foundations, 2016-present
  • Center for Women in Law
    - Circle of Leaders
  • Dallas Women Lawyers Association

Honors and Awards

  • Listed in Lawdragon 500 Leading Plaintiff Financial Lawyers, 2019

  • Listed in Texas Super Lawyers Rising Stars, 2010-2013

Civic and Charitable Activities

  • Attorneys Serving the Community

Selected Speaking Engagements

  • Speaker, 2019 Women in Law Institute, October 3, 2019

  • Speaker, ABA Judicial Intern Opportunity Program Orientation, Dallas, Texas, June 2, 2016

  • Speaker, Silicon Valley IP Enforcement and Monetization Summit, Palo Alto, California, April 21, 2016

  • Speaker, International Women’s Leadership Forum, Managing Intellectual Property, New York City, June 6, 2015

Representative Matters

    Western District of Texas

  • Representing Yahoo Inc. in a patent infringement action involving email management technology. Peter Pedersen v. Yahoo Inc., Case No. 6:21-cv-01308-ADA.

  • Represented TruSun Technologies in a patent infringement suit against Eaton involving LED technologies. TruSun Technologies et al. v. Eaton et al., Case No. 6:19-cv-00656-ADA.

  • Eastern District of Texas

  • Representing Verizon in a patent infringement matter involving network resources management technology. Telecom Network Solutions, LLC v. Cellco Partnership d/b/a Verizon Wireless, Case No. 2:21-cv-00416-JRG.

  • Represented BMC Software, Inc. in a patent infringement dispute involving ITSM software solutions. BMC Software v. ServiceNow, Inc., Case No. 2:14-cv-00903-JRG.

  • Represented ContentGuard Holdings Inc., a Xerox PARC-seeded company, in four district court litigations involving fundamental digital rights management patents. ContentGuard Holdings, Inc. v. Google, Inc., Case No. 2:14-cv-00061-JRG; ContentGuard Holdings, Inc. v. Apple, Inc., Case No. 2:13-cv-01112-JRG; ContentGuard Holdings, Inc. v. DIRECTV, LLC, Case No. 2:15-cv-00128-JRG; ContentGuard Holdings, Inc. v. Huawei Device USA, Inc. et al, Case No. 2:16-cv-00176-JRG.

  • Northern District of Texas

  • Represented Lockheed Martin in an antitrust suit involving refurbishment of P-3 fixed wing maritime surveillance aircraft. L-3 Communications Integrated Systems LP v. Lockheed Martin Corp., Case No. 3:07-cv-00341.

  • Northern District of California

  • Represented Yahoo, Inc. in a suit brought by Droplets Inc., for alleged patent infringement, seeking $260 million and a finding of willful infringement. An Oakland federal jury found no infringement with respect to four Yahoo products and, on the one remaining product, awarded less than 7% of Droplets’ damages demand. The jury also did not find any willful infringement. Droplets, Inc. v. Yahoo! Inc., Case No. 4:12-cv-03733-JST.

  • International Trade Commission

  • Represented Respondent Holochip in an International Trade Commission Investigation involving focus-tunable lenses. In the Matter of Certain Tunable Lenses and Products Containing the Same, Inv. No. 337-TA-1282.

  • Represented TiVo subsidiary Rovi adverse to Comcast in an International Trade Commission Investigation involving numerous patents related to interactive television program guides, DVR technology, and related technologies. In the Matter of Certain Digital Video Receivers, Broadband Gateways, and Related Hardware and Software Components, Inv. No. 337-TA-1158.

  • Represented Ericsson in multiple patent infringement disputes in the International Trade Commission related to LTE, WCDMA, GSM/GPRS/EDGE, and 802.11 wireless technology and FRAND/RAND standard issues. In the Matter of Certain Electronic Devices, Including Wireless Communication Devices, Tablet Computers, Media Players, and Televisions, and Components Thereof, Inv. No. 337-TA-862; In the Matter of Certain Wireless Communications Equipment and Articles Therein, Inv. No. 337-TA-866.

  • New York State Court

  • Represented the Trustee in multiple residential mortgage backed securities litigation. HSBC (Trustee) v. Nomura Credit & Capital.

  • Represented the Trustee in multiple residential mortgage backed securities litigation. HSBC (Trustee) v. Merrill Lynch, Countrywide, Bank of America.